ali awan

Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of 0.62°F. Find the 90th percentile of the sample mean body temperatures for samples of size 16.

Participants from the National Health and Nutrition Examination Survey, 2003–2004, had a mean BMI of 28.3 with a standard deviation of 6.0. Assuming BMI is normally distributed, what proportion of the participants had a BMI measure over 35?

Find the value of Z that is smaller than 90% of all values of Z.

7. Determine whether it is appropriate to apply the Central Limit Theorem for Proportions: sample size 35, sample proportion 0.95. A) Yes B) No

10. Using the results of a Newsweek poll conducted in March of 2009, a 90% confidence interval on the proportion of adult Americans who have a favorable opinion of Barack Obama is given by (0.699, 0.741). If everything else is the same, but the confidence...

12. Suppose we are estimating p and we have no prior estimate of p. Find the required sample size for a confidence level of 90% and a margin of error of 0.02.