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Test of claim for the statement made for a given paired sample:
Suppose you want to test the claim the paired sample data given below come from a population for which the mean difference is mean d = 0.
50
80
84
61
59
82
71
57
93
81
94
60
Use a 0.05 significance level to find the following:
(a) The mean value of the differences d for the paired sample data d=
(b) The standard deviation of the differences d for the paired sample data sd=
(c) The t test statistic t =_
(d) The positive critical value t =_
(e) The negative critical value
(f) Does the test statistic fall in the critical region?
A. No B. Yes
(g) Construct a 95% confidence interval for the population mean of all differences x - y.
Calculate P value? Calculate critical value?
Use alpha level. 05 to compute and interpret Pearson's r and to test whether it is important (using all your steps for hypothesis test).
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
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