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20. Step 6~8:Conclusion: t=.45, p____0.05

A. >

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19. Critical value is

A. 1.729
B. 1.829
C. 1.629
D. 1.929

二、计算题18-20为同一大题18. For the following information, computer the t value manually and write a conclusion as to whether there was a change in tons of paper used as a function of the recycling program in 20 different districts.Step 1: H0: before=afterH1: before

A. 17
B. 18
C. 19
D. 20

一、单选题1. The test statistic calculated by the statistical procedure selected is known as the ______.

A. Obtained value
B. Critical value
Calculated value
D. Statistical value

17. In order to be 95% confident you have not committed a Type I error, at what level should you set your p value?

A. 0.95
B. 0.9
C. 0.05
D. 0.01