(Solved): Lab 8 - Hypothesis Testing (One Sample) For each hypothesis test, you must include the following: - ...

Lab 8 - Hypothesis Testing (One Sample) For each hypothesis test, you must include the following: - Identification of the appropriate test to use - Null and alternative hypothesis with a labeled claim - Test Statistic - P-Value - A sketch of the critical region(s) with the test statistic clearly labeled - Justification for rejecting or failing to reject the null hypothesis - A complete sentence conclusion which includes the original claim. Part 2. Mean 4. The hourly wages in a particular industry are normally distributed with mean $\$13.20$ and standard deviation $\$2.50$. A company in this industry employs 40 workers, paying them an average of $\$12.20$ per hour. Can this company be accused of paying substandard wages? Use an $?=.01$ level test. susp. 5. A vice president in charge of sales for a large corporation claims that salespeople are averaging no more than 15 sales contacts per week. (He would like to increase this figure.) As a check on his claim, $n=36$ salespeople are selected at random, and the number of contacts made by each is recorded for a single randomly selected week. The mean and variance of the 36 measurements were 17 and 9 , respectively. Does the evidence contradict the vice president's claim? Use a test with level $?=.05$. 6. Listed below are brain volumes (in centimeters cubed) of unrelated subjects used in a study. Use a 0.05 significance level to test the claim that the population of brain volumes has a mean equal to 1100.8 centimeters cuhed.