An Associate at a Large Home Improvement Store Claims That

Multiple Choice

An associate at a large home improvement store claims that she can build a composite 12 × 20 ft deck for an average cost of $7200.We sample eight decks built by this associate and find that the average cost was $8215.22 with a standard deviation of $711.16.Does it appear from this sample that the claim of $7200 is not accurate (either too high or too low) ? State the critical value (CV) , test statistic (TS) , and decision from the test.(Use α = 0.05.)

A) CV = 2.3646; TS = 1.43; fail to reject her claim
B) CV = 1.8946; TS = 1.43; fail to reject her claim
C) CV = 1.8946; TS = 4.04; reject her claim
D) CV = 2.3646; TS = 4.04; reject her claim