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Author Question: Students of a large university spend an average of 5 a day on lunch. The standard deviation of the ... (Read 105 times)

danielfitts88

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on: Jun 24, 2018
Students of a large university spend an average of 5 a day on lunch. The standard deviation of the expenditure is 3 . A simple random sample of 36 students is taken.
 a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean?
 b. What is the probability that the sample mean will be at least 4?
  c. What is the probability that the sample mean will be at least 5.90?

Question 2

For the standard normal probability distribution, the area to the left of the mean is _____.
 a. .5
  b. 0.5
  c. any value between 0 and 1
  d. 1


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brittrenee

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

a. 5.0; .5; normal
b. .9772
c. .0359

Answer to Question 2

b


danielfitts88

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Reply 2 on: Jun 24, 2018
Excellent

xiazhe

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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