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(Solved by Expert Tutors) Question 1: A random sample of male college baseball players



A random sample of male college baseball players

and a random sample of male college soccer players were obtained independently and weighted. The distributions of both data sets suggest that the population distributions are roughly Normal. Test whether there is a significant difference between their mean weights, using a significance level of 10%.

(a) State the null and alternative hypothesis. Also specify the type of test.
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(b) Insert the table ?Independent Samples Test?







(c) State the p-value from table from (b). Compare with the significance level





(d) Make the conclusion. Explain whether we have strong evidence to support/reject the claim.




Question 2:

Brain size for 20 random women and 20 random men was obtained and is reported in the table (in hundreds of thousands of pixels shown in an MRI). Test the hypothesis that men tend to have larger brains than women at the 5% level.

(a) State the null and alternative hypothesis. Also specify the type of test.
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??????????????????????????????????????????? Ho:
??????????????????????????????????????????? Ha:


(b) Insert the table ?Independent Samples Test?







(c) State the p-value from table from (b). Compare with the significance level





(d) Make the conclusion. Explain whether we have strong evidence to support/reject the claim.







Question 3:

The prices of a sample of books at UCSB were obtained. Then the prices of books for the same subjects (at the same level) were obtained for CSUN. Assume that the distribution of differences is Normal enough to proceed, and assume that the sampling was random. Test the hypothesis that the population means are different, using a significance level of 5%.

(a) State the null and alternative hypothesis. Also specify the type of test.
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??????????????????????????????????????????? Ho:
? ??????????????????????????????????????????Ha:


(b) Insert the table ?Paired Samples Test?







(c) State the p-value from table from (b). Compare with the significance level





(d) Make the conclusion. Explain whether we have strong evidence to support/reject the claim.

 


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Apr 19, 2020

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