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1. Determine a 99% confidence interval for ยต if n = 120, x = 0.816, and s = 0.061. 2. Use the info from the problem above and test the if the mean is 1. 3. From a random sample of 70 high school seniors in a particular school district, the sample mean and standard deviation of the math scores in the SAT are found to be 496 and 75, respectively. Determine a 95% confidence interval for the mean math score of all seniors in the school district. 4. Use the info from the problem above to determine if the population mean is less than 630. 5. An experiment compared the ability of 7 and 9 year olds to solve a problem requiring a certain type of abstract reasoning. Five of 21 seven-year olds and 14 of 16 nine-year olds solved the problem. Construct the 95% confidence interval on the difference in proportions. 6. Use the info above and test if the proportions are equal or not. 7. Given a standard deviation of 3, and an error within .1. If we want to find a 95% confidence interval, how many subjects would be needed? 8....

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