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Author Question: Construct a 98 confidence interval for the population mean, . Assume the population has a normal ... (Read 67 times)

theo

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on: Jul 24, 2018
Construct a 98 confidence interval for the population mean, . Assume the population has a normal distribution. A study of 14 car owners showed that their average repair bill was 192 with a standard deviation of 8. Round to the nearest cent.
 
  A) (186.33, 197.67 ) B) (222.33, 256.10 ) C) (328.33, 386.99 ) D) (115.40, 158.80 )

Question 2

The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.0 minutes and a standard deviation of 1 minute.
 
  Find the probability that a
  randomly selected college student will take between 1.5 and 4.0 minutes to find a parking spot in the library
  lot.
  A) 0.7745 B) 0.4938 C) 0.0919 D) 0.2255


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livaneabi

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

A

Answer to Question 2

A


theo

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Reply #2 on: Jul 24, 2018
Thank you!


livaneabi

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Reply #3 on: Jul 24, 2018
Always glad to help...


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