10.8 Test 1 Computer Practice

# 10.8 Test 1 Computer Practice - 5 yr weight 30.5 37 42 45.5...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 5 yr weight 30.5 37 42 45.5 36 29.4 36.5 38.5 39 40 28.5 45.5 35 32 33 30.5 38 37 42 49 29 A. Is the variance of weight of 5 yr old boys more than 30 lbs sqaured? Use a 5% significance level. Test and CI for One Variance: 5 yr weight Statistics Method Variable N StDev Variance 5 yr weight 21 5.83 34.0 Null hypothesis Sigma-­‐squared = 30 Alternative hypothesis Sigma-­‐squared > 30 The chi-­‐square method is only for the normal distribution. The Bonett method is for any continuous distribution. B. Construct a 90% confidence interval for the standard deviation of the weights of 5 yr old boys. 90% Confidence Intervals 90% Confidence Intervals CI for CI for Variable Method StDev Variance 5 yr weight Chi-­‐Square (4.65, 7.91) (21.6, 62.6) Bonett (4.74, 7.77) (22.5, 60.3) 4.65, 7.91 Use a 5% significance level. Variable N StDev Variance 5 yr weight 21 5.83 34.0 he weights of 5 yr old boys. Tests Test Variable Method Statistic DF P-­‐Value 5 yr weight Chi-­‐Square 22.64 20 0.307 Bonett — — 0.299 ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern