Statistics and Probability

If a standard deviation for a set of scores is 9.0, then the variance for those scores is .

If a standard deviation for a set of scores is 9.0, then the variance for those scores is .

If a standard deviation for a set of scores is 9.0, then the variance for those scores is .
 
  a. 81.0
  b. 18.0
  c. 9.0
  d. 3.0

zns889   53   2 Replies

zns889

If robs = +.40, then percent of the variance in the scores of one variable is associated with ...

If robs = +.40, then percent of the variance in the scores of one variable is associated with ...

If robs = +.40, then percent of the variance in the scores of one variable is associated with variation in the other variable.
 
  a. 40
  b. 60
  c. 16
  d. 8

Mserna19   181   2 Replies

Anonymous

Find a ten dollar bill on the sidewalk. Find a ten dollar bill on the grass.

Find a ten dollar bill on the sidewalk. Find a ten dollar bill on the grass.

Find a ten dollar bill on the sidewalk.
  Find a ten dollar bill on the grass.
 
  A) Yes B) No

Nalu   100   2 Replies

Nalu

A researcher is conducting tests of manual dexterity among college students. The time to complete a ...

A researcher is conducting tests of manual dexterity among college students. The time to complete a ...

A researcher is conducting tests of manual dexterity among college students. The time to complete a certain task is normally distributed with a mean of 30.3 seconds and a standard deviation of 7.2 seconds.
 
  Find the probability that a r

Brutusandmoose   50   2 Replies

Brutusandmoose

Find P(A), given that P( :

Find P(A), given that P( :

Find P(A), given that P(
 
  A) = 0.684.
  A) 1.684 B) 1.462 C) 0 D) 0.316

jldobro   16   2 Replies

jldobro

The probability that Luis will pass his statistics test is 0.58. Find the probability that he will ...

The probability that Luis will pass his statistics test is 0.58. Find the probability that he will ...

The probability that Luis will pass his statistics test is 0.58. Find the probability that he will fail his statistics test.
 
  A) 0.42 B) 1.72 C) 0.29 D) 1.38

cmsx27   62   2 Replies

cmsx27

If SSTotal = 100.00, SSA = 40.00, SSError = 60.00, dfTotal = 34, dfA = 4, and dfError = 30 in a ...

If SSTotal = 100.00, SSA = 40.00, SSError = 60.00, dfTotal = 34, dfA = 4, and dfError = 30 in a ...

If SSTotal = 100.00, SSA = 40.00, SSError = 60.00, dfTotal = 34, dfA = 4, and dfError = 30 in a one-factor between-subjects analysis of variance, then MSA = .
 
  a. 1.18
  b. 0.10
  c. 2.00
  d. 10.00

NERD   36   2 Replies

NERD

If the results of a correlational study were reported as r(12) = -.32, p > .05, then you would ...

If the results of a correlational study were reported as r(12) = -.32, p > .05, then you would ...

If the results of a correlational study were reported as r(12) = -.32, p > .05, then you would know that subjects participated in the study.
 
  a. 10
  b. 14
  c. 13
  d. 12

fundai!   55   2 Replies

fundai!

A doctor performs several diagnostic tests to determine the reason for a patient's illness.

A doctor performs several diagnostic tests to determine the reason for a patient's illness.

A doctor performs several diagnostic tests to determine the reason for a patient's illness.
 
  A) Experimental B) Observational
 
  Identify the type of observational study (cross-sectional, retrospective, prospective).

Mserna19   39   2 Replies

Mserna19

A recent survey based on a random sample of n = 470 voters, predicted that the Independent candidate ...

A recent survey based on a random sample of n = 470 voters, predicted that the Independent candidate ...

A recent survey based on a random sample of n = 470 voters, predicted that the Independent candidate for the mayoral election will get 24 of the vote, but he actually gets 27. Can it be concluded that the survey was done incorrectly?
 
  W

jldobro   44   2 Replies

jldobro

Both and are independent estimates of the population variance of scores in a one-factor ...

Both and are independent estimates of the population variance of scores in a one-factor ...

Both and are independent estimates of the population variance of scores in a one-factor between-subjects analysis of variance.
 
  a. MSTotal; MSA
  b. MSTotal; MSError
  c. SSA; SSError
  d. MSA; MSError

infantryman1986   36   2 Replies

infantryman1986

In a normal distribution, what proportion of scores fall within the interval between the mean to one ...

In a normal distribution, what proportion of scores fall within the interval between the mean to one ...

In a normal distribution, what proportion of scores fall within the interval between the mean to one standard deviation below the mean?
 
  a. .1359
  b. .3413
  c. .6826
  d. .8413

rgasio   42   2 Replies

rgasio

In the normal distribution, .3413 of the scores will be located in the interval between the mean and ...

In the normal distribution, .3413 of the scores will be located in the interval between the mean and ...

In the normal distribution, .3413 of the scores will be located in the interval between the mean and .
 
  a. plus and minus 1
  b. plus and minus 2
  c. minus 1
  d. plus 2

sdaggy1   25   2 Replies

sdaggy1

A presidential candidate obtains a sample of registered voters by interviewing everyone who attends ...

A presidential candidate obtains a sample of registered voters by interviewing everyone who attends ...

A presidential candidate obtains a sample of registered voters by interviewing everyone who attends a party fund raiser.
 
  A) No B) Yes

everlyn85   54   2 Replies

everlyn85

If Y = -.8X, then what is the value of Y when X = 10?

If Y = -.8X, then what is the value of Y when X = 10?

If Y = -.8X, then what is the value of Y when X = 10?
 
  a. -8.0
  b. +8.0
  c. -0.8
  d. Not enough information is given to answer this question.

palacir999   11   2 Replies

palacir999

Given a normal distribution with a mean of 20 and a standard deviation of 4, which of the following ...

Given a normal distribution with a mean of 20 and a standard deviation of 4, which of the following ...

Given a normal distribution with a mean of 20 and a standard deviation of 4, which of the following statements is correct?
 
  a. More scores are above 20 than below 20.
  b. More scores are above 24 than below 16.
  c. There are

beaches411   23   2 Replies

beaches411

Scores on the final exam in Math 160 have a mean of 73 and standard deviation of 7.8.If 24 students ...

Scores on the final exam in Math 160 have a mean of 73 and standard deviation of 7.8.If 24 students ...

Scores on the final exam in Math 160 have a mean of 73 and standard deviation of 7.8.If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70.
 
  A) 0.1006 B) 0.9699 C) 0.0278 D) 0.0301

rgasio   51   2 Replies

rgasio

Men's weights are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. You ...

Men's weights are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. You ...

Men's weights are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. You need to design an elevator for an office building and it must safely carry 9 people.
 
  Find the maximum total allowable weight if we want

CTaustin   59   2 Replies

CTaustin

The probability of at least 43 boys :

The probability of at least 43 boys :

The probability of at least 43 boys
 
  A) The area to the right of 43 B) The area to the left of 42.5
  C) The area to the right of 43.5 D) The area to the right of 42.5

Acostak1   25   2 Replies

Acostak1

A market researcher obtains a sample of 50 people by standing outside a store and asking every 20th ...

A market researcher obtains a sample of 50 people by standing outside a store and asking every 20th ...

A market researcher obtains a sample of 50 people by standing outside a store and asking every 20th person who enters the store to fill out a survey until she has 50 people.
 
  What sampling method is being used here? Will the resulting s

Acostak1   175   2 Replies

01_ADI KUSUMA

In the standard normal distribution, which of the following intervals between z scores contains the ...

In the standard normal distribution, which of the following intervals between z scores contains the ...

In the standard normal distribution, which of the following intervals between z scores contains the largest proportion of scores?
 
  a. -1.0 to +1.0
  b. 0.0 to +1.0
  c. +1.0 to +2.0
  d. 0.0 to -2.0

littlej_dvine   37   2 Replies

littlej_dvine

If the results of an experiment using a one-factor between-subjects analysis of variance were ...

If the results of an experiment using a one-factor between-subjects analysis of variance were ...

If the results of an experiment using a one-factor between-subjects analysis of variance were reported as F(4, 70) = 2.96, p < .05, then which of the following statements is true?
 
  a. H0 was =  =  =  =  A A A A A 1 2 3 4 5 .
 b. Fo

koklok123   71   2 Replies

koklok123

Bill kept track of the number of hours he spent exercising each week. The results for four months ...

Bill kept track of the number of hours he spent exercising each week. The results for four months ...

Bill kept track of the number of hours he spent exercising each week. The results for four months are shown below.
 
  Find the mean number of hours Bill spent exercising per week. Round your answer to two decimal places.
  7.50 6.90

beaches411   59   2 Replies

beaches411

The number of vehicles passing through a bank drive-up line during each 15-minute period was ...

The number of vehicles passing through a bank drive-up line during each 15-minute period was ...

The number of vehicles passing through a bank drive-up line during each 15-minute period was recorded. The results are shown below.
 
  Find the median number of vehicles going through the line in a fifteen-minute period.
  20 22 20 2

ejohnson3310   43   2 Replies

ejohnson3310

What is the death rate due to diabetes in deaths per 100,000?

What is the death rate due to diabetes in deaths per 100,000?

What is the death rate due to diabetes in deaths per 100,000?
 
  A) 29 deaths per 100,000 B) 24 deaths per 100,000
  C) 409 deaths per 100,000 D) 3489 deaths per 100,000

Storm   44   2 Replies

Storm

What is the death rate due to liver disease in deaths per 100,000?

What is the death rate due to liver disease in deaths per 100,000?

What is the death rate due to liver disease in deaths per 100,000?
 
  A) 927 deaths per 100,000 B) 65 deaths per 100,000
  C) 1541 deaths per 100,000 D) 11 deaths per 100,000

everlyn85   49   2 Replies

everlyn85

The following confidence interval is obtained for a population proportion, p: 0.608 < p < ...

The following confidence interval is obtained for a population proportion, p: 0.608 < p < ...

The following confidence interval is obtained for a population proportion, p:
  0.608 < p < 0.640
  Use these confidence interval limits to find the margin of error, E.
 
  A) 0.017 B) 0.624 C) 0.016 D) 0.032

ejohnson3310   69   2 Replies

ejohnson3310

N = 186, x = 140; 95 percent : (Multiple Choice)

N = 186, x = 140; 95 percent : (Multiple Choice)

n = 186, x = 140; 95 percent
 
  A) 0.703 < p < 0.803 B) 0.691 < p < 0.815 C) 0.690 < p < 0.816 D) 0.704 < p < 0.802

Jbev757   12   2 Replies

Jbev757

Bill kept track of the number of hours he spent exercising each week. The results for 15 weeks are ...

Bill kept track of the number of hours he spent exercising each week. The results for 15 weeks are ...

Bill kept track of the number of hours he spent exercising each week. The results for 15 weeks are shown below. Find the midrange.
 
  7.0 7.0 7.0 7.0 7.8
  8.0 6.8 8.5 8.5 7.0
  8.7 7.0 8.0 9.0 7.8
  A) 7.8 B) 2.2 C) 7.75 D

CTaustin   49   2 Replies

CTaustin

In one county, the conviction rate for speeding is 85. Estimate the probability that of the next 100 ...

In one county, the conviction rate for speeding is 85. Estimate the probability that of the next 100 ...

In one county, the conviction rate for speeding is 85. Estimate the probability that of the next 100 speeding summonses issued, there will be at least 90 convictions.
 
  A) 0.0420 B) 0.8962 C) 0.1038 D) 0.3962

nameless23   24   2 Replies

nameless23

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly ...

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly ...

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test.
 
  Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95 confidence interval f

browniels   21   2 Replies

browniels

A meteorologist records the number of clear days in a given year in each of 21 different U.S. ...

A meteorologist records the number of clear days in a given year in each of 21 different U.S. ...

A meteorologist records the number of clear days in a given year in each of 21 different U.S. cities. The results are shown below. Find the midrange.
 
  72 143 52 84 100 98 101
  120 99 121 86 60 59 71
  125 130 104 74 83 55 169

Skoochy   41   2 Replies

Skoochy

A psychologist claims that more than 3.1 percent of the population suffers from professional ...

A psychologist claims that more than 3.1 percent of the population suffers from professional ...

A psychologist claims that more than 3.1 percent of the population suffers from professional problems due to extreme shyness. Identify the type II error for the test.
 
  A) The error of failing to reject the claim that the true proportion

everlyn85   34   2 Replies

everlyn85

An article in a journal reports that 34 of American fathers take no responsibility for child care. ...

An article in a journal reports that 34 of American fathers take no responsibility for child care. ...

An article in a journal reports that 34 of American fathers take no responsibility for child care.
 
  A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of 234 fathers from Littleton yielde

escoba   270   2 Replies

bio_man

An article in a journal reports that 34 of American fathers take no responsibility for child care. A ...

An article in a journal reports that 34 of American fathers take no responsibility for child care. A ...

An article in a journal reports that 34 of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton.
 
  A random sample of 225 fathers from Littleton, yield

escoba   49   2 Replies

escoba

A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. ...

A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. ...

A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. Find the probability of a type II error, , given that the true value of the population proportion is 0.72.
  
  The sample size is

KAtlold   446   2 Replies

bio_man

What is the probability of randomly selecting a person who died from diabetes?

What is the probability of randomly selecting a person who died from diabetes?

What is the probability of randomly selecting a person who died from diabetes?
 
  A) 0.00024 B) 0.03489 C) 28.65799 D) 0.00409

gracehiller11   41   2 Replies

gracehiller11

Assume that you are predicting X from Y. Which of the following correlation coefficients would yield ...

Assume that you are predicting X from Y. Which of the following correlation coefficients would yield ...

Assume that you are predicting X from Y. Which of the following correlation coefficients would yield predictions with the most error?
 
  a. r = -.20.
  b. r = -.40.
  c. r = -1.00.
  d. r = +.10.

gracehiller11   15   2 Replies

gracehiller11

Jeanne is currently taking college economics. The instructor often gives quizzes. On the past five ...

Jeanne is currently taking college economics. The instructor often gives quizzes. On the past five ...

Jeanne is currently taking college economics. The instructor often gives quizzes. On the past five quizzes, Jeanne got the following scores:
 
  6 20 1 15 10
  Compute the range.
  A) 1 B) 4 C) 19 D) 20

KAtlold   27   2 Replies

KAtlold

A linear regression line is assumed to .

A linear regression line is assumed to .

A linear regression line is assumed to .
 
  a. curve slightly upwards at the highest value of X
  b. be a straight line relation throughout the range of X values
  c. curve slightly downwards at the lowest value of X
  d. a

Skoochy   25   2 Replies

Skoochy