Statistics and Probability

Need help with the formula

Need help with the formula

A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores we

Twilight   41   2 Replies

yeyah

Least squared

Least squared

Suppose the manager of a gas station monitors how many bags of ice he sells daily along with recording the highest temperature each day during the summer. The data are plotted with temperature, in degrees Fahrenheit (°F), as the explanatory variable

uwjah2000   31   1 Reply

bio_man

The Graded Naming Test and sociocultural differences: Researchers often use z tests to compare their

The Graded Naming Test and sociocultural differences: Researchers often use z tests to compare their

The Graded Naming Test and sociocultural differences: Researchers often use z tests to compare their samples to known population norms. The Graded Naming Test (GNT) asks respondents to name objects in a set of 30 black-and-white drawings. The test, o

AnaDalia   25   1 Reply

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bio_man

Statistics help

Statistics help

An organizational psychologist conducted a study to see whether upgrading a companyʹs older computer system to newly released, faster machines would cause an increase in productivity from the current average of 120 units with a standard deviation of

sonmarie72   80   4 Replies

kament

Need help thank you

Need help thank you

Researchers monitoring the number of wolves and rabbits in a wildlife reserve think that the size of the wolf population depends on the rabbit population, since wolves eat rabbits. Over the years, researchers have collected the following data.

cristina8   39   2 Replies

bio_man

I am taking data online and i just want to check if my answers are right! I am teaching myself

I am taking data online and i just want to check if my answers are right! I am teaching myself

So the question is
You are hired by ILC industries to survey its employees about their working conditions. The following table lists the number of employees in each division.

Division             

Cristina   33   1 Reply

bio_man

In a survey of women in a certain country​ (ages 20 minus −​29), the mean height was 64.7 ...

In a survey of women in a certain country​ (ages 20 minus −​29), the mean height was 64.7 ...

In a survey of women in a certain country​ (ages 20
minus

Catracho   84   5 Replies

bio_man

Assume the random variable x is normally distributed with mean mu equals 50 μ=50 and standard ...

Assume the random variable x is normally distributed with mean mu equals 50 μ=50 and standard ...

Assume the random variable x is normally distributed with mean μ=50 and standard deviation σ=7. Find the indicated probability.


P(x>34)=

Catracho   51   1 Reply

bio_man

Assume the random variable x is normally distributed with mean mu μ equals = 86 86 and standard ...

Assume the random variable x is normally distributed with mean mu μ equals = 86 86 and standard ...

Assume the random variable x is normally distributed with mean
 

Catracho   50   3 Replies

bio_man

The average time spent sleeping​ (in hours) for a group of medical residents at a hospital can be ...

The average time spent sleeping​ (in hours) for a group of medical residents at a hospital can be ...

The average time spent sleeping​ (in hours) for a group of medical residents at a hospital can be approximated by a normal​ distribution, as shown in the graph to the right. Answer parts​ (a) and​ (b) below.

Catracho   86   4 Replies

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bio_man

The time spent​ (in days) waiting for a heart transplant for people ages​ 35-49 can be ...

The time spent​ (in days) waiting for a heart transplant for people ages​ 35-49 can be ...

The time spent​ (in days) waiting for a heart transplant for people ages​ 35-49 can be approximiated by the normal​ distribution, as shown in the figure to the right.

​(a) What waiting time represents the
5
5th ​percentile?

Catracho   44   1 Reply

bio_man

Use the normal distribution of SAT critical reading scores for which the mean is 506 and the standar

Use the normal distribution of SAT critical reading scores for which the mean is 506 and the standar

Use the normal distribution of SAT critical reading scores for which the mean is 506 and the standard deviation is 106. Assume the variable x is normally distributed.

A) What percent of the SAT verbal scores are less than 625?
B) If 1

ryann   21   1 Reply

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bolbol

Find the indicated​ z-scores shown in the graph.

Find the indicated​ z-scores shown in the graph.

Find the indicated​ z-scores shown in the graph.

Catracho   24   1 Reply

bio_man

Find the indicated​ z-score shown in the graph to the right.

Find the indicated​ z-score shown in the graph to the right.

Find the indicated​ z-score shown in the graph to the right.

Catracho   21   1 Reply

5 / 5

bio_man

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If the area is not in the​ table, use the entry closest to the area. If the area is halfway between two​ entries, use the​ z-score halfway between the corres

Catracho   23   1 Reply

bio_man

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If the area is not in the​ table, use the entry closest to the area. If the area is halfway between two​ entries, use the​ z-score halfway between the corres

Catracho   23   1 Reply

bio_man

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If ...

Use the standard normal table to find the​ z-score that corresponds to the given percentile. If the area is not in the​ table, use the entry closest to the area. If the area is halfway between two​ entries, use the​ z-score halfway between the corres

Catracho   24   1 Reply

bio_man

Use the normal distribution of SAT critical reading scores for which the mean is 507 507 and the st

Use the normal distribution of SAT critical reading scores for which the mean is 507 507 and the st

Use the normal distribution of SAT critical reading scores for which the mean is

Catracho   26   1 Reply

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bolbol

Use a table of cumulative areas under the normal curve to find the​ z-score that corresponds to ...

Use a table of cumulative areas under the normal curve to find the​ z-score that corresponds to ...

Use a table of cumulative areas under the normal curve to find the​ z-score that corresponds to the given cumulative area. If the area is not in the​ table, use the entry closest to the area. If the area is halfway between two​ entries, use the​ z-sc

Catracho   22   1 Reply

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bio_man

Use the standard normal table to find the​ z-score that corresponds to the cumulative area 0.9251 ...

Use the standard normal table to find the​ z-score that corresponds to the cumulative area 0.9251 ...

Use the standard normal table to find the​ z-score that corresponds to the cumulative area of 0.9251. If the area is not in the table, use the entry closes to the area. If the area is halfway between

Catracho   23   1 Reply

bio_man

Use the normal distribution of fish lengths for which the mean is 10 10 inches and the standard dev

Use the normal distribution of fish lengths for which the mean is 10 10 inches and the standard dev

Use the normal distribution of fish lengths for which the mean is 10 inches and the standard deviation is 2 inches. Assume the variable x is normally distributed.

Use the normal distribution of fish lengths for which the
(a) What per

Catracho   19   1 Reply

bio_man

The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a mean ...

The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a mean ...

The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 222 milligrams per deciliter and a standard deviation of 371 milligrams per
deciliter
(a) What percent of the men have a total cholesterol

Catracho   27   2 Replies

bio_man

Milligrams per deciliter with a standard deviation of 37.6 milligrams per deciliter. Assume the tota

Milligrams per deciliter with a standard deviation of 37.6 milligrams per deciliter. Assume the tota

milligrams per deciliter with a standard deviation of 37.6 milligrams per deciliter. Assume the total cholesterol levels are normally distributed. Find the highest total cholesterol level a woman in this 20-34 age group can have and still be in the b

ryann   34   2 Replies

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bio_man

The amounts a soft drink machine is designed to dispense for each drink are normally​ distributed, .

The amounts a soft drink machine is designed to dispense for each drink are normally​ distributed, .

The amounts a soft drink machine is designed to dispense for each drink are normally distributed, with a mean of 12.3 fluid ounces and a standard deviation of 0.2 fluid ounce. A
drink is random,' selected
(a) Find the probability tha

Catracho   25   1 Reply

bio_man

Assume the random variable x is normally distributed with mean mu equals 50 μ=50 and standard ...

Assume the random variable x is normally distributed with mean mu equals 50 μ=50 and standard ...

Assume the random variable x is normally distributed with mean
mu equals 50
μ=50 and standard deviation
sigma equals 7
σ=7. Find the indicated probability.

Upper P left parenthesis x greater than 35 right parent

Catracho   34   1 Reply

bio_man

An example of a uniform distribution is ​f(x) equals =1 for 0 less than or equals ≤x less than ...

An example of a uniform distribution is ​f(x) equals =1 for 0 less than or equals ≤x less than ...

An example of a uniform distribution is ​f(x)
equals
=1 for 0
less than or equals
≤x
less than or equals
≤1. The mean of the distribution for this example is 0.5 and the standard deviation is approximat

Catracho   42   1 Reply

bio_man

Find the indicated probability using the standard normal distribution. ​P(z greater than > ...

Find the indicated probability using the standard normal distribution. ​P(z greater than > ...

Find the indicated probability using the standard normal distribution.

Catracho   30   1 Reply

bio_man

Find the probability of z occurring in the indicated region of the standard normal distribution.

Find the probability of z occurring in the indicated region of the standard normal distribution.

Find the probability of z occurring in the indicated region of the standard normal distribution.

Catracho   24   1 Reply

bio_man

For the standard normal distribution shown on the​ right, find the probability of z occurring in ...

For the standard normal distribution shown on the​ right, find the probability of z occurring in ...

For the standard normal distribution shown on the​ right, find the probability of z occurring in the indicated region.

Catracho   30   1 Reply

bio_man

A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score ...

A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score ...

A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1520 and the standard deviation was 310.

The test scores of four students selected at random are 1940, 1270, 2230, and 1400. Find the z-s

Catracho   29   1 Reply

bio_man

You work for a consumer watchdog publication and are testing the advertising claims of a tire manufa

You work for a consumer watchdog publication and are testing the advertising claims of a tire manufa

You work for a consumer watchdog publication and are testing the advertising claims of a tire manufacturer. The manufacturer claims that the life spans of the tires are normally​ distributed, with a mean of​ 40,000 miles and a standard deviation of 4

Catracho   152   1 Reply

5 / 5

bio_man

Find the indicated area under the standard normal curve. To the left of z equals = 0.85

Find the indicated area under the standard normal curve. To the left of z equals = 0.85

Find the indicated area under the standard normal curve.

To the left of z equals = 0.85

Catracho   28   1 Reply

bio_man

Find the area of the shaded region under the standard normal curve.

Find the area of the shaded region under the standard normal curve.

Find the area of the shaded region under the standard normal curve.

Catracho   23   1 Reply

bio_man

Find the area of the indicated region under the standard normal curve.

Find the area of the indicated region under the standard normal curve.

Find the area of the indicated region under the standard normal curve.

The area between z = 0 and z = 1.7 under the standard normal curve is

(Round to four decimal places as needed.)

Catracho   26   1 Reply

bio_man

Twenty dash four Twenty-four percent of people in a city eligible to donate blood actually do. You r

Twenty dash four Twenty-four percent of people in a city eligible to donate blood actually do. You r

Twenty-four percent of people in a city eligible to donate blood actually do. You randomly select four eligible blood donors and ask them if they donate blood. Complete parts​ (a) through​ (d) below.
​(a) Find the mean of the binomial distributi

Catracho   24   1 Reply

bio_man

Explain the assumptions that must be satisfied in order to validly use the one-way ANOVA formulas.

Explain the assumptions that must be satisfied in order to validly use the one-way ANOVA formulas.

Explain the assumptions that must be satisfied in order to validly use the one-way ANOVA formulas.

Catracho   58   2 Replies

bio_man

Explain why we conduct pairwise comparisons of treatment means.

Explain why we conduct pairwise comparisons of treatment means.

Explain why we conduct pairwise comparisons of treatment means.

Catracho   61   3 Replies

5 / 5

bio_man

37​% of women consider themselves fans of professional baseball. You randomly select six women and ...

37​% of women consider themselves fans of professional baseball. You randomly select six women and ...

37​% of women consider themselves fans of professional baseball. You randomly select six women and ask each if she considers herself a fan of professional baseball. Complete parts​ (a) through​ (d) below.
​(a) Find the mean of the binomial distr

Catracho   34   1 Reply

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bio_man

36​% of women consider themselves fans of professional baseball. You randomly select six women ...

36​% of women consider themselves fans of professional baseball. You randomly select six women ...

36​% of women consider themselves fans of professional baseball. You randomly select six women and ask each if she considers herself a fan of professional baseball. Complete parts​ (a) through​ (c) below.
​(a) Construct a binomial distribution u

Catracho   27   1 Reply

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bio_man

Forty Forty percent of households say they would feel secure if they had​ $50,000 in savings. You ...

Forty Forty percent of households say they would feel secure if they had​ $50,000 in savings. You ...

Forty
Forty percent of households say they would feel secure if they had​ $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had​ $50,000 in savings. Find the probability that the number that say

Catracho   35   1 Reply

bio_man