No, because we can\'t guarantee that students from cach section in the sample. -

Question

No, because we can't guarantee that students from cach section in the sample. --cy No, because we can't guarantee that students from each gender in the sample. e erYes, because the students were chosen at random. 8) A marine biologist is studying great white sharks. The lengths of 22 randomly selected sharks have been measured in feet. The summary statistics and a 95% confidence interval for the population mean are given. The biologist is interested in testing whether the average length of great white sharks is different from 16 feet. Mean 15.490909 2.20236 ean 0.4695447 Mean 16467381 451 4437 Std Dev Std Err M Upper 9s% Lower 95% Mean ! Calculate a test statistic and estimate the P-value for the biologist's hypotheses. a) The test statistic is 1.084 and the P-value is between 0.20 and 0.30. b) The test statistic is 1.084 and the P-value is between 0.10 and 0.15. The test statistic is -1.084 and the P-value is between 0.20 and 0.30. d) The test statistic is -1.084 and the P-value is between 0.10 and 0.15. The test statistic is 33.71 and the P-value is 0. X- 0.469 s4129

Explanation / Answer

Ans:

standard error of mean=s/sqrt(n)=0.4695

Test statistic:

t=(15.4909-16)/0.4695=-1.084

p-value=TDIST(1.084,21,2)=0.2907

Hence,test statistic is -1.084 and p-value is between 0.2 and 0.3

Option c is correct.

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