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The average height of men in Cameroon is 1.706 meters with a standard deviation of 0.154 m. Height is approximately normally distributed. Suppose that a sample of 35 men is selected, find the range of the central 68% of sample mean heights?

Suppose that you were going to take a sample of Florida students. You were interested in estimating the proportion who had ever called/emailed/spoken with their congressmen. You believe that the proportion is close to 0.10; however, you wanted to be 95% confident with a margin of error equal to 0.028. What sample size do you need?

In the year 2014, according to salary.com, physical therapists in Jacksonville, Florida have an average annual salary of 75,000. The standard deviation is about 6,000 dollars. The distribution of salaries is right skewed. Suppose that a sample of 10 physical therapists is taken from Jacksonville, Florida. What is the sampling distribution of the sample mean?  

Find the value of t for a 99% confidence interval for the population mean when n = 19.

What would be the value of z for a 94% confidence interval for the population proportion?

What is the standard error of the sampling distribution of the sample mean?

What conditions are necessary for the sampling distribution of the sample proportion to be approximately Normally distributed? (There may be more than one answer. Please check all that apply.)

Suppose that you were going to take a sample of Florida students. You were interested in estimating the proportion who had ever called/emailed/spoken with their congressmen. You believe that the proportion is close to 0.08; however, you wanted to be 95% confident with a margin of error equal to 0.028. What sample size do you need?

Which of the following is a property of the t distribution?

A researcher was interested in testing the hypothesis to see if there was majority support for a new bill. She found a p-value equal to 0.002. What would be her conclusion?