7.Chapters 7 & 8 Analysis: Use the Bears.xls data for the following analysis (an explanation of the fields used can be found on page 601 in your text). Answer all questions completely showing all appropriate intermediate statistics used in the analysis. You need to also include the summaries from StatCrunch or Excel. Make sure answers are complete and statistically accurate. Extra points are given also including summary statements that would be easy for the layperson to understand. Although you may use StatCrunch also include the t, Z, orX²that would be needed for the problem with the appropriate hand calculations for the test statistic (you may use Statcrunch for calculating any standard deviation or means). Use 95% CI and .05 alpha levels for consistency sake.

a.It looks like there female bears are older than the male bears. Test the claim that the female bears are older than the males. Use the appropriate null and alternate hypothesis and statistical test. Include an appropriate graph to highlight your conclusion.

b.Find the average (mean) head length of the female and male bears. Use confidence intervals around the means to help determine if the average weights are significantly different from one another? Include an appropriate graph to highlight your conclusion.

c.Find the standard deviation for the weights for the female and male bears. Use confidence intervals or the appropriate hypothesis test to determine if the standard deviations are significantly different.

d.Take a look at the data. For parts b and c what are we not accounting for that we probably should be accounting for and what effect might it have on the responses to

parts b and c?