Suppose the sampling distribution for average calories in bananas is normally distributed with a mean of 105 and a standard error of 4.  Find the range of central 99.7% of sample means.

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

For a 95% confidence interval for the population mean, what value of t would you use? n = 15

Suppose that you were interested in conducting a survey of Floridians and asking if they approved of the President. Suppose that you have no idea what this proportion would be, but at the end of the study you want to calculate a 95% confidence interval with a 0.045 margin of error. Find the sample size needed.

In the 2012 presidential election, 57.5% of eligible voters cast their vote. Suppose that 200 randomly selected eligible voters were asked if they had voted in the 2012 presidential election. What approximate distribution would you expect for the sampling distribution of the sample proportion of Americans who voted in the 2012 presidential election?  

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. Suppose that a sample of 15 physical therapists is taken from Jacksonville, Florida. What is the sampling distribution of the sample mean?  

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 were uncertain what this proportion was; however, you wanted to be 95% confident with a margin of error equal to 0.028. What sample size do you need?

The amount of calories in a Big Mac at McDonalds is Normally distributed with a mean of 563 calories and a standard deviation of 35. Suppose that a random sample of 10 small servings was collected. What is the probability that the sample mean is greater than 590 calories?

In the Congo, the infant mortality rate is 5.934%. Suppose that a random sample of 1000  births was conducted. What is the probability that the infant mortality rate in the sample was less than 5.7%?

The Queensland male koala has an average weight of 6.5kg. Male Koalas weights are normally distributed with a standard deviation of 0.82. Suppose that 10 randomly selected koalas were selected. What is the sampling distribution of the sample mean?