=+c. If t 5 0.47, what conclusion is appropriate? 10.51 The true average diameter of ball bearings

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=+c. If t 5 0.47, what conclusion is appropriate?

10.51 The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. What conclusion is appropriate when testing H0

: m 5 0.5 versus Ha

: m Þ 0.5 in each of the following situations:

a. n 5 13, t 5 1.6, a 5 .05

b. n 5 13, t 5 21.6, a 5 .05

c. n 5 25, t 5 22.6, a 5 .01

d. n 5 25, t 5 23.6

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