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For a 95% confidence interval for the population mean, what value of t would you use? n = 16

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 15 randomly selected koalas were selected. What is the sampling distribution of the sample mean?

Suppose that 60% of Americans planned to vote in the next election. You take a random sample of 32 people and ask them if they plan on voting in the next presidential election.  What approximate distribution would you expect for the sampling distribution of the sample proportion of Americans who planned on voting?

For Ho:p = 0.60 versus Ha: p does not equal 0.60, when the test statistic equals 1.44, what is the p-value?

Suppose the sampling distribution for average weight for soccer players is normally distributed with a mean of 152 pounds and a standard error of 5.  Find the range of central 95% of sample means.

Suppose that you took a random sample of 20 students at FSU and asked them how many minutes they exercised yesterday. Suppose that you wanted to make a 99% confidence interval for the population mean. What value would you use for t?

Suppose that you took a random sample of 25 students at FSU and asked them how many minutes they exercised yesterday. Suppose that you wanted to make a 99% confidence interval for the population mean. What value would you use for t?

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 5 randomly selected koalas were selected. What is the sampling distribution of the sample mean?

Suppose that you wanted to estimate the population proportion of students at UF that approved of the job that congress was doing. You decided to take a sample, but you needed to determine what size sample to take. You were uncertain what this proportion would be. You wanted to be 95% confident and to have a margin of error of 0.055. What size sample would you need? 

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?