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KIN 222 (11)
Ken Stark (11)
Lecture 7

KIN 222 Lecture 7: Lecture 7-t tests
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Department
Kinesiology
Course
KIN 222
Professor
Ken Stark
Semester
Winter

Description
97 t tests What is the ttest? Statistical test that is based on the Students tdistribution. Used to compare: A group mean against a test statistic.. one sample t test Means between two different groups.. independent t test Means within one group with 2 measurements paired sample t test repeated measures if same person : pre and posttest after training program = paired sample t test ztest vs ttest: Use ztest when population standard deviation is known. There is ONE zdistribution There are MANY tdistributions.. wont fit normal distribution bc small sample size could be infinite of t distributions William Gosset June 13, 1876 October 16, 1937 Chemistmathematician Worked for Guinness brewery after university Worked on different varieties of barley (quality control) Small samples..how to analyze? Developed a family of tdistributions Published as Student
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