Tommy's MATH 3339 Final Exam Summer 2019

Question 6 Your answer is CORRECT. Identify the most appropriate test to use for the following situation: A national computer retailer believes that the average sales are greater for salespersons with a college degree. A random sample of 14 salespersons with a degree had an average weekly sale of $3542 last year, while 17 salespersons without a college degree averaged $3301 in weekly sales. The standard deviations were $468 and $642 respectively. Is there evidence to support the retailer's belief? a) Two sample z test for means b) Two sample z test for proportions c) Two sample t test for means d) One sample z test for proportions e) One sample t test for means f) Matched pairs t test for means g) One sample z test for means Question 7 Your answer is CORRECT. A random sample of 169 cans of fruit nectar is drawn from among all cans produced in a run. Prior experience has shown that the distribution of the contents has a mean of 12.11 ounces and a standard deviation of 2.11 ounces. What is the probability that the average contents of the 169 sample cans are less than 11.86 ounces? a) 0.938 b) 0.877 c) 0.154 d) 0.062 e) 0.123