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39. For eachof the casesbelow, show theappropriate t - value and the approximating normal zvalue: a. confidence level 98%, df120. b. confidence level 90%,

39. " For eachof the casesbelow, show theappropriate t - value and the approximating normal zvalue:

a. confidence level 98%, df120.

b. confidence level 90%, df 2."

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