Homework answers / question archive / Question1)A confidence interval               Question 2 Which of the following statements is a characteristic of the t distribution?   Question 3 The fraction or ratio of a sample possessing a certain trait is called a   Question 4 We wish to develop a confidence interval for the population mean

Question1)A confidence interval               Question 2 Which of the following statements is a characteristic of the t distribution?   Question 3 The fraction or ratio of a sample possessing a certain trait is called a   Question 4 We wish to develop a confidence interval for the population mean

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Question1)A confidence interval

 

 

 

 

 

 

 

Question 2

Which of the following statements is a characteristic of the t distribution?

 

Question 3

The fraction or ratio of a sample possessing a certain trait is called a

 

Question 4

We wish to develop a confidence interval for the population mean. The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 10 observations. We decide to use the 90 percent level of confidence. The appropriate value of to represent the level of confidence is

 

Question 5

We wish to develop a confidence interval for the population mean. The shape of the population is not known, but we have a sample of 40 observations. We decide to use the 92 percent level of confidence. The appropriate value of z is:

 

Question 6

To develop a confidence interval for a proportion

 

Question 7

If we wish to decrease the width (increase the precision) of a confidence interval, we would

 

Question 8

The finite population correction factor is used when

 

Question 9

We wish to estimate the population proportion. We want to be 95 percent confident of our results and we want the estimate to be within .01 of the population parameter. No estimate of the population proportion is available. What value should we use for p?

 

Question 10

A point estimate is