A sample of 40 Los Angeles pharmacies sells the Tamiflu 75mg prescription drug for about $137 for a moth supply ( S = $30.2 ). Ideally, pharmaceutical companies would like the drug to be sold for $150. Using the hypothesis test at the 0.05 level of significance, test whether there is a significant difference in price.
How significant are the result? What is the best estimate of the p-value for the result of this hypothesis test ?
Calculate a 95% confidence interval and interpret the results.