A medical researcher obtains the systolic blood pressure readings (in millimeters of mercury) in the accompanying list for women aged 18-24 who have a new strain of viral infection. (As in Exercise 1, healthy women in that age group have readings that are normally distributed with a mean of 114.8 and a standard deviation of 13.1.)

a. Find the sample mean x and standard deviation s.
b. Use a 0.05 significance level to test the claim that the sample comes from a population with a mean equal to 114.8.
c. Use the sample data to construct a 95% confidence interval for the population mean m. Do the confidence interval limits contain the value of 114.8, which is the mean for healthy women aged 18-24?
d. Use a 0.05 significance level to test the claim that the sample comes from a population with a standard deviation equal to 13.1, which is the standard deviation for healthy women aged 18-24.
e. Based on the preceding results, does it seem that the new strain of viral infection affects systolic blood pressure?

Transcribed Image Text:

134.9 78.7 108.9 133.0 123.7 96.1 126.9 89.8 132.0 134.7 132.1 121.7 112.3 150.2 158.3 154.4