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Author Question: The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and ... (Read 151 times)

j.rubin

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on: Jul 24, 2018
The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds. What is the standardized score (z-score) for a boot-up of time x =35 seconds?
 a. -2.0
  b. 0.0
  c. 1.0
  d. 2.0

Question 2

The following ranges are possible 95 confidence intervals for the percentage of Americans who think they work too many hours. For which one of the confidence intervals could you conclude that a majority of the population thinks they work too many hours?
 a. 41 to 49
  b. 49 to 54
  c. 42 to 51
  d. 52 to 58


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mmj22343

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

C

Answer to Question 2

D


j.rubin

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Reply 2 on: Jul 24, 2018
Gracias!

Joy Chen

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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