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Hypothesis testing problems

Refer to the real estate data which report information on the homes sold in Denver Colorado year at:

http://highered.mcgraw-hill.com/sites/0073030228/student_view0/index.html

.A. At the .05 significance level can we conclude that there is a difference in the mean selling price of the homes with a pool and hoes without a pool?

B. at the .05 significance level can we conclude that thee is a difference in the mean selling price of homes with an attached garage

C, at the .05 significance level can we conclude that there is difference in the mean selling price of homes in township1 and township 2

D. find the median and selling prices of the homes. Divide the homes into two groups those that sold for more or equal to the median and those who sold for less. Is there a difference in the proportion of homes with a pool for those that sold at or above the median price versus those which sold for less than the median price? Use the .05 significance level.

Ques 2:
Refer to the base ball 2005 data at:

http://highered.mcgraw-hill.com/sites/0073030228/student_view0/index.html
which report information on the 30 major baseball teams.

A. at the .05 significance level, can we conclude that there is a difference in the mean salary of teams in the American versus teams in the national league.

B. at the .05 significance level, can we conclude that there is a difference in the mean home attendance of teams in the American league versus teams in the national league.

C. computes the mean and the standard deviation of the number of wins for the 10 items with the highest salaries. Do the same for the 10 teams with the lowest salaries. At the .05 significance level?is there a difference in the mean number of wins for the two groups

Solution Preview

Here is the explanation for your questions.
QUES 1: Is there a difference in the proportion of homes with a pool for those that sold at or above the median price versus those which sold for less than the median price? Use the .05 significance level.

Yes, there is a difference. ...

Solution Summary

Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.

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