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Author Question: Briefly explain what the 95 interval estimate tells you.[br][br][b][color=#165FFA]Question ... (Read 135 times)

melly21297

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on: Jun 24, 2018
Briefly explain what the 95 interval estimate tells you.

Question 2

Which of the following statements are true?
 a. The pooled-variances t-test is used whenever the population standard deviations are assumed to be equal regardless of the sample size.
  b. The unequal-variances t-test is used whenever the population standard deviations are unknown and cannot be assumed to be equal.
  c. The z-test can be used as a close approximation to the unequal-variances t-test when the population standard deviations are not assumed to be equal, but samples are large (each n 30).
  d. All of these statements are true.
  e. None of these statements is true.


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yifu223

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

We estimate that the daily sales during the campaign increase, on average, between .387 and 1.527.

Answer to Question 2

D


melly21297

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

epscape

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

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