# Question

Cash withdrawals from a college credit union for a random sample of 30 Fridays and 30 Mondays are shown. At 5 .01, is there a difference in the mean withdrawal on Monday and Friday?

(a) Make stacked dot plots of the data (a sketch is OK).

(b) State the hypotheses.

(c) State the decision rule and sketch it.

(d) Find the test statistic.

(e) Make a decision.

(f) Find the p-value and interpret it.

(a) Make stacked dot plots of the data (a sketch is OK).

(b) State the hypotheses.

(c) State the decision rule and sketch it.

(d) Find the test statistic.

(e) Make a decision.

(f) Find the p-value and interpret it.

## Answer to relevant Questions

In MiniCase 10.2, we found that the mean methane gas emissions for the two pneumatic controller manufacturers were not equal. When choosing formula 10.3 to calculate the t statistic, we assumed that their variances were not ...Concerned about graffiti, mayors of nine suburban communities instituted a citizen Com- munity Watch program. (a) State the hypotheses to see whether the number of graffiti incidents declined. (b) Find the test ...A survey of 100 mayonnaise purchasers showed that 65 were loyal to one brand. For 100 bath soap purchasers, only 53 were loyal to one brand. Form a 95 percent confidence interval for the difference of proportions. Does it ...Students in nutrition classes at two high schools were asked to keep track of the number of times during the past month that they ordered from a fast-food chain restaurant. (a) The re-search hypothesis is that Sonando High ...In a one-factor ANOVA with n1 = 7, n2 = 6, n3 = 5, n4 = 5, and n5 = 7, the sample standard deviations were s1 = 12, s2 = 24, s3 = 16, s4 = 46, and s5 = 27. For Hartley's test: (a) State the hypotheses. (b) Calculate the ...Post your question

0