Consider the following hypothesis test: : 20 : < 20 A sample of 40 provided a sample mean of 19.4. The population standard deviation is 2. a. Compute the value of the test statistic (to 2 decimals). Enter negative value as negative number. -1.90 b. What is the p-value (to 3 decimals)? c. Using a = 0.05, can it be concluded that the population mean is less than 20? - Select your answer - d. Using = 0.05, what is the critical value for the test statistic (to 3 decimals)? Enter negative value as negative number. State the rejection rule: Reject Ho if z is - Select your answer - the critical value. Using a = 0.05, can it be concluded that the population mean is less than 20? - Select your answer -