1. Develop the Boxplot and state the Quartiles and any outliers for the following exam scores:

80, 96, 100, 78, 62, 94, 86, 100, 20, 72, 84, 98, 74, 90, 88, 70, 74, 88, 68, 106 n

2. Cholesterol values are normally distributed with a mean of 180 and standard deviation of 10. Find the % of values as specified below:

a. at 175 or below

b. at 190 or higher

c. between 170 and 185

3. A medication is designed to reduce cholesterol to a desired target value of below 190. If a random sample of 50 patients record a mean of 180 and standard deviation of 7 after treatment, is there evidence that the medication has met the desired goal?

a. State the hypotheses

b. Find the appropriate t-value and state the disposition of the Null Hypothesis along with the significance value, degrees of freedom and 95% confidence interval.

6. We want to determine the sample size for estimating the population proportion p that would vote for candidate A with a 99% confidence interval and a margin of error of no greater than

3%. What is the sample size given that we have no fore knowledge so that p should be a value

of 0.5 or 50% ?

7. A recent survey found that out of a random sample of 120 drivers, 80 of them exceed the speed limit on highways. What is the 95% confidence interval for the proportion p of drivers that do not exceed the speed limit