Suppose a study reports that the average price for a gallon of


Question 1

Suppose a consider reports that the middle charge for a gallon of self-serve systematic unleaded gasoline is $3.16. You venerate that the metaphor is loftier in your area of the country. You individualize to experiment this pretension for your dissect of the United States by strayly employment gasoline stations. Your stray scan of 25 stations produces the subjoined charges (all in dollars). Assume gasoline charges for a part are normally arranged. Did the facts you obtained collect ample averment to decline the pretension? Use a 1% roll of soundness.


Make positive you obviously aver twain the vain and the choice hypotheses in ample sentences. Subjoined your calculations, obviously aver the falsification in the identical habit (do not solely say “accept/decline vain”) and illustrate how you arrived at this falsification (inveterate on which metrics).


3.27, 3.3, 3.16, 3.15, 3.11, 3.05, 3.08, 3.12, 3.13, 3.14, 3.16, 3.19, 3.27, 3.14, 3.14, 3.2, 3.3, 3.09, 3.05, 3.07, 3.37, 3.34, 3.35, 3.35, 3.1

Question 2


Where do CFOs get their capital tidings? According to Robert Half International, 47% get their capital tidings from tidingspapers, 15% get it from communication/colleagues, 12% get it from television, 11% from the Internet, 9% from magazines, 5% from radio, and 1% do not comprehend. Suppose a researcher wants to experiment these results. She strayly samples 67 CFOs and finds that 40 of them get their capital tidings from tidingspapers. Does the experiment semblance ample averment to decline the findings of Robert Half International? Use a = .05.


Make positive you obviously aver twain the vain and the choice hypotheses in ample sentences. Subjoined your calculations, obviously aver the falsification in the identical habit (do not solely say “accept/decline vain”) and illustrate how you arrived at this falsification (inveterate on which metrics).

 

Question 3


To response this interrogation, use the Facts Analysis Toolpack in Excel and excellent “t-Test: Two-Sample Assuming Similar Variances” from the catalogue of conducive cat's-paws. Conduct a supposition experiment using this cat's-paw. Illustrate your response (how you individualized if men bestow over or not) and embody the output consideration.


Some studies entertain semblancen that in the United States, men bestow over than women buying gifts and cards on Valentine’s Day. Suppose a researcher wants to experiment this supposition by strayly sampling 9 men and 10 women delay similar demographic characteristics from diversified vast cities abutting the United States to be in a consider. Each consider dissecticipant is asked to restrain a log inauguration 1 month precedently Valentine’s Day and chronicles all purchases made for Valentine’s Day during that 1-month duration. The resulting facts are semblancen underneath. Use these facts and a 1% roll of soundness to experiment to individualize if, on middle, men substantially do bestow significantly over than women on Valentine’s Day. Assume that such bestowing is normally arranged in the population and that the population variances are similar.


Make positive you obviously aver twain the vain and the choice hypotheses in ample sentences. Embody the output consideration; then, obviously aver the falsification in the identical habit (do not solely say “accept/decline vain”) and illustrate how you arrived at this falsification (inveterate on which metrics).