1.For a confidence level of 98% with a sample size of 19, find the criticaltvalue.

2.The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 51.9 for a sample of size 633 and standard deviation 7.2.

Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level).

Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).

3.If n=430 and p^(p-hat) =0.77, find the margin of error at a 99% confidence level

4.Testing:

H0: p = 0.86

H1: p > 0.86

Your sample consists of 100 subjects, with 83 successes. Calculate the test statistic, rounded to 2 decimal places

5.Suppose are running a study/poll about the probability of catching the flu this year. You randomly sample 81 people and find that 36 of them match the condition you are testing.

Suppose you are have the following null and alternative hypotheses for a test you are running:

H0: p = 0.49

Ha: p > 0.49

Calculate the test statistic, rounded to 3 decimal places

6.You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.34. Thus you are performing a right-tailed test. Your sample data produce the test statisticz=2.33

. Find the p-value accurate to 4 decimal places.

NOTE: Since you are given the z-score use the NORMAL DISTRIBUTION calculator with

=0 and =1