Answer Happy

Isabella, an accomplished Bay to Breakers runner, claims that the standard deviation for her time to run the 7.5 mile race is at most three minutes. To test her claim, Rupinder looks up five of her race times. They are 55 minutes, 61 minutes, 58 minutes, 63 minutes, and 57 minutes. (a) What is the hypothesis test? Ho: Select an answer Ho Select an answer (b) What is the x? test statistic? Round to two decimal places (b) What is the P-value? Round to two decimal places, (c) What is your decision at the 5% significance level? O Fail to reject the null hypothesis. Reject the null hypothesis. (d) Based on the sample results, there is Select an answer to warrant rejection of Isabella's claim that the standard deviation of her running times is at most 3 minutes.

Test the claim that the mean GPA of night students is larger than 2.8 at the 0.01 significance level. The null and alternative hypothesis would be: Ho: p = 0.7 HO: 2.8 Ho: 2.8 Ho:P < 0.7 Ho: < 2.8 Ho:p > 0.7 H:P +0.7 H1:4 + 2.8 H1:4 < 2.8 H :p > 0.7 H1:4 > 2.8 H :p < 0.7 o O O o O The test is: left-tailed two-tailed right-tailed o Based on a sample of 65 people, the sample mean GPA was 2.81 with a standard deviation of 0.06 a The p-value is: (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis