Q 8.1

Construct a 90% confidence interval to estimate the popu-lation mean using the following data: x = 75 s = 20 n = 36

Q 8.7

Construct a 90% confidence interval to estimate the popu-lation mean using the following data: x = 85 s = 20 n = 10

What assumptions need to be made to construct this interval?

Q9.3

9.14 Consider the following hypotheses and sample data, and then answer the following questions using as = 0.05. H0:}L516 H1I>16 1'9 19 12 18 22 21 14 21 I7 15 a. What conclusion should be drawn? 1). Use PHStat to determine the p-value for this test. 9.3 Consider the following hypotheses: Ho: M S 50 H: u > 50 Given that x = 52, o = 12, n = 36, and a = 0.05, answer the following questions: a. What conclusion should be drawn? b. Determine the p-value for this test