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QUESTION 1 2 POINTS Some researchers are doing a two mean pooled t test They...

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QUESTION 1 2 POINTS Some researchers are doing a two mean pooled t test They have two samples with sizes n 17 and n2 21 The population standard deviations are unknown but assumed to be equal so the sample standard deviations are found and used to calculate a pooled standard deviation Sp For sample 1 s 9 8 and 30 For sample 2 2 10 5 and 27 What are the test statistic t and the degrees of freedom to perform this test Select the correct answer below If Sp 10 195 then 17 21 t 10 195 7 df 38 If Sp 10 195 then 30 27 t df 36 11 10 195 V 17 21 df 36 If Sp 10 195 then 17 21 t 10 195 7 If sp 10 195 then 30 27 t 1 48 10 195 0 9 11 V 30 27 1 48 1 11

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