SRMP_Statistics.pdf

# 28 worksheet t tests chi square continued 1 which

This preview shows pages 28–31. Sign up to view the full content.

28 WORKSHEET: T-tests & Chi Square (continued) 1. Which normal curve indicates that the data the greatest variation in its dataset? • Red • Green • Blue • Purple/Violet Which normal curve indicates that the data the least variation in its dataset? • Red • Green • Blue • Purple/Violet Which datasets have the exact same means? Mark all that apply. • Red • Green • Blue • Purple/Violet Which datasets have different means from those in question 3? Mark all that apply. • Red • Green • Blue • Purple/Violet

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Science Research Mentoring Program STATISTICS © 2013 American Museum of Natural History. All Rights Reserved. 30 ACTIVITY: Run a T-test on the Data (continued) S O W H A T D O E S T H E T W O S T A N D F O R ? A T W O -T A I L E D T E S T If you are using a significance level of 0.05, a two-tailed test allots half of your alpha to testing the statistical significance in one direction and half of your alpha to testing statistical significance in the other direction. This means that .025 is in each tail of the distribution of your test statistic. When using a two-tailed test, regardless of the direction of the relationship you hypothesize, you are testing for the possibility of the relationship in both directions. For example, we may wish to compare the mean of a sample to a given value x using a t-test. Our null hypothesis is that the mean is equal to x. A two-tailed test will test both if the mean is significantly greater than x and if

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the 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