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


Question 1

Suppose a con-over reports that the mean value for a gallon of self-serve orderly unleaded gasoline is $3.16. You judge that the metaphor is surpassing in your area of the empire. You flow to touchstone this pretension for your dissect of the United States by unpremeditatedly pursuit gasoline stations. Your unpremeditated view of 25 stations produces the forthcoming values (all in dollars). Assume gasoline values for a country are normally as sorted. Did the postulates you obtained yield abundance exemplification to repel the pretension? Use a 1% smooth of sagacity.


Make stable you explicitly specify twain the void and the choice hypotheses in bountiful sentences. Forthcoming your calculations, explicitly specify the falsification in the similar behavior (do not barely say “accept/repel void”) and expound how you arrived at this falsification (fixed 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 currency tidings? According to Robert Half International, 47% get their currency 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 apprehend. Suppose a researcher wants to touchstone these results. She unpremeditatedly samples 67 CFOs and finds that 40 of them get their currency tidings from tidingspapers. Does the touchstone profession abundance exemplification to repel the findings of Robert Half International? Use a = .05.


Make stable you explicitly specify twain the void and the choice hypotheses in bountiful sentences. Forthcoming your calculations, explicitly specify the falsification in the similar behavior (do not barely say “accept/repel void”) and expound how you arrived at this falsification (fixed on which metrics).

 

Question 3


To tally this doubt, use the Postulates Analysis Toolpack in Excel and chosen “t-Test: Two-Sample Assuming Similar Variances” from the roll of advantageous machines. Conduct a conjecture touchstone using this machine. Expound your tally (how you flowd if men disburse over or not) and understand the output table.


Some studies conduct professionn that in the United States, men disburse over than women buying gifts and cards on Valentine’s Day. Suppose a researcher wants to touchstone this conjecture by unpremeditatedly sampling 9 men and 10 women after a while approximate demographic characteristics from multitudinous big cities athwart the United States to be in a con-over. Each con-over dissecticipant is asked to conduct a log rise 1 month anteriorly Valentine’s Day and archives all purchases made for Valentine’s Day during that 1-month end. The resulting postulates are professionn adown. Use these postulates and a 1% smooth of sagacity to touchstone to detail if, on mean, men actually do disburse significantly over than women on Valentine’s Day. Assume that such disburseing is normally as sorted in the population and that the population variances are similar.


Make stable you explicitly specify twain the void and the choice hypotheses in bountiful sentences. Understand the output table; then, explicitly specify the falsification in the similar behavior (do not barely say “accept/repel void”) and expound how you arrived at this falsification (fixed on which metrics).