Shoe manufacturers must know the distribution of foot sizes of different age group. Foot size of 10 inch or above is defined as big size. 19% of 230 randomly selected Ontario men were with big feet. Write down the upper limit of 91% confidence interval for the proportion of Ontario men with big feet. Give your answer to 3 decimal places. (If the CI = (1.2, 3.8) then upper limit of the CI is 3.8)

among various ethnic groups, the standard deviation of heights is known to  be approximately three inches.  We wish to construct a 95% confidence interval for the mean height of males from a certain country.  Forty eight males are surveyed from a particular country..  The sample mean is 70 inches.  The sample standard deviation is 2.6 inches.  construct a 95% confidence interval for the population mean height of males of theis country?

A random sample of 100 employees at a company shows that 62 are female.  Form a 90% confidence interval for the proportion of all employees who are female.  The interval is 0.62  what margin of error?  Round your answer to 3 decimal places.

Construct a 96% confidence interval if x=75 and n=200. Round your answers to 3 decimal places.

We wish to estimate what percent of adult residents in a certain county are parents. Out of 200 adult residents sampled, 34 had kids. Based on this, construct a 90% confidence interval for the proportion, p, of adult residents who are parents in this county. Give your answers as decimals, to three places.

I want to estimate the population mean number of times that adults eat breakfast in a week. I spoke with 12 coworkers, and the numbers were 7, 5, 5, 7, 2, 3, 7, 5, 1, 0, 7, 6. Calculate a 95% confidence interval for the population mean (round 3 decimal places).

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A confidence interval on p is (.356, .418). What are p-hat and the margin of error?