Suppose you wanted to determine if you should reject the null hypothesis that running a playing fast tempo (as opposed to slow) music in your store decreases sales by $100 on average. On 65 randomly selected days with fast tempo music on the average store sales is $2,345 with a sample standard deviation of 45, while on 75 randomly selected days with slow tempo music on the average store sales is $2,555, with a sample standard deviation of 65. What would be the proper t-stat for this hypothesis test?

A.

B.

C.

D.
 


Answer: B

Biology & Microbiology

You might also like to view...

A water-vascular system that operates the tube

feet is characteristic of the

a. arthropods. b. annelids. c. chordates. d. mollusks. e. echinoderms

Biology & Microbiology

Antiviral drugs _____ genital herpes

1.cure 2.reduce the symptoms during recurrences of 3.reduce the frequency of recurrences of 4.reduce the shedding of virus particles in cases of 5.Answer choices 2, 3, and 4 are correct.

Biology & Microbiology

Which of the following is a clonal animal?

A) sheep B) coral C) mouse D) quail

Biology & Microbiology

Why is insulin produced by genetically engineered E. coli cells superior to insulin obtained from animal sources?

a. Animal insulin has a shorter life span than insulin produced using recombinant DNA techniques. b. Recombinantly produced insulin contains human rather than animal sequences, reducing the chances of an allergic response. c. Animal insulin is more difficult to purify than recombinantly produced insulin. d. Recombinantly produced insulin has a much higher activity level. e. Recombinantly produced insulin is easier to obtain than insulin from animals.

Biology & Microbiology