A Manufacturer of Mosquito Repellent Claims That the Average Amount

Multiple Choice

A manufacturer of mosquito repellent claims that the average amount of time that its repellent is effective is at least 3.5 hr.A consumer group tests the claim using five randomly selected people.If the average time of effectiveness from the sample was 3.8 hr with a standard deviation of 0.76 hr, what is the critical value (CV) , test statistic (TS) , and decision for this test? (Use α = 0.025.)

A) CV = -2.7764; TS = 0.88; fail to reject H₀
B) CV = 2.7764; TS = 0.88; fail to reject H₀
C) CV = 2.5706; TS = 0.39; fail to reject H₀
D) CV = -2.5706; TS = -0.88; fail to reject H₀