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Rye Rye
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7 years ago
For a binomial probability distribution, the probability of success must always be greater than the probability of failure.
 
  Indicate whether the statement is true or false

Q. 2

Approximately what proportion of the observations is between 428 and 572?
 
  What will be an ideal response?

Q. 3

If P(A  B ) = 0, then A and B must be collectively exhaustive.
 
  Indicate whether the statement is true or false

Q. 4

A continuous random variable X is normally distributed with a mean of 1200 and a standard deviation of 150. Given that X = 1410, its corresponding Z-score is 1.40.
 
  Indicate whether the statement is true or false

Q. 5

A two-way table used for a test of independence is sometimes called a:
 
  A) contingency table.
  B) frequency table.
  C) t table.
  D) manifold table.

Q. 6

The confidence interval for the difference between two population means that are normally distributed where the population variances are unknown but assumed to be equal rely on:
 
  A) the Satterthwaite's approximation.
  B) the pooled sample variance.
  C) the estimated sample variance.
  D) the average sample variance.
Textbook 
Statistics

Statistics


Edition: 12th
Authors:
Read 88 times
1 Reply

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Replies
wrote...
#1
7 years ago
Ans. #1

FALSE

Ans. #2

The values 428 and 572 are within  three standard deviations of the mean; hence the Empirical Rule implies that the proportion of the observations between these two values is approximately 1.0. That is, almost all the observations are contained between 428 and 572.

Ans. #3

FALSE

Ans. #4

TRUE

Ans. #5

A

Ans. #6

B
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