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Author Question: Excel's _____ function can be used to compute the variance of a discrete random variable. a. ... (Read 138 times)

meagbuch

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on: Jun 24, 2018
Excel's _____ function can be used to compute the variance of a discrete random variable.
 a. SUMPRODUCT
  b. AVERAGE
  c. MEDIAN
  d. VAR

Question 2

A student believes that the average grade on the statistics final examination was 87 . A sample of 36 past final examinations was taken. The average grade in the sample was 83.96 with a standard deviation of 12.
 a. State the null and alternative hypotheses.
  b. Using the critical value approach, test the hypotheses at the 5 level of significance.
  c. Using the p-value approach, test the hypotheses at the 5 level of significance.


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ntsoane kedibone

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Reply #1 on: Jun 24, 2018
Answer to Question 1

a

Answer to Question 2

a. H0:  = 87
Ha:   87
b. test statistic t = -1.52, critical t = 2.03; do not reject H0
c. p-value is between .1 and .2; therefore, do not reject H0


meagbuch

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Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

raenoj

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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