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Author Question: Two independent samples of sizes 25 and 35 are randomly selected from two normal populations with ... (Read 158 times)

mp14

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on: Jun 24, 2018
Two independent samples of sizes 25 and 35 are randomly selected from two normal populations with equal variances (assumed to be unknown). In order to test the difference between the population means, the test statistic is:
 a. a standard normal random variable.
  b. approximately standard normal random variable.
  c. Student t-distributed with 58 degrees of freedom.
  d. Student t-distributed with 33 degrees of freedom.

Question 2

The time series component that reflects a long-term, relatively smooth pattern or direction exhibited by a time series over a long time period is called seasonal.
  Indicate whether the statement is true or false


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lgoldst9

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

C

Answer to Question 2

F


mp14

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Reply #2 on: Jun 24, 2018
Thank you :)


lgoldst9

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Reply #3 on: Jun 24, 2018
Happy to help you


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