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Author Question: A recent survey found that 71 of all adults over 50 wear sunglasses for driving. In a random sample ... (Read 123 times)

panfilo

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on: Jul 25, 2018
A recent survey found that 71 of all adults over 50 wear sunglasses for driving. In a random sample of 60 adults over 50, what is the mean and standard deviation of those that wear sunglasses?
 
  A) mean: 42.6; standard deviation: 3.51482574 B) mean: 17.4; standard deviation: 3.51482574
  C) mean: 17.4; standard deviation: 6.52686755 D) mean: 42.6; standard deviation: 6.52686755

Question 2

n = 183, x = 158; 95 level
 
  A) 0.813 to 0.914 B) 0.824 to 0.903 C) 0.814 to 0.913 D) 0.823 to 0.904


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miss.ashley

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Reply #1 on: Jul 25, 2018
Answer to Question 1

A

Answer to Question 2

C


panfilo

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Reply 2 on: Jul 25, 2018
YES! Correct, THANKS for helping me on my review

Joy Chen

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Reply 3 on: Yesterday
Gracias!

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