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Suppose systolic blood pressure of adults has a normal distribution with mean 130 and standard deviation 35. Research question: Do statistics teachers have a higher average systolic blood pressure than 130? A random sample of 100 statistics teachers is obtained and the mean is 135. (The population standard deviation is known, so we use Z for critical values.)

Let ? be the average systolic blood pressure for the population of statistics teachers. The null and alternative hypotheses are

H0 : ? = 130 null hypothesis HA : ? > 130 alternative hypothesis

Solve the using the Confidence Interval Hypothesis Test approach and t.test() Approach.

Use the Pima.tr data set to evaluate the hypothesis that the population mean of diastolic blood pressure for Pima Indian women is not 70.

library(MASS)

data("Pima.tr")

#str(Pima.tr)

?Pima.tr