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Author Question: In order to estimate the average time spent on the computer terminals per student at a local ... (Read 81 times)

RODY.ELKHALIL

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on: Jun 24, 2018
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected from a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.2 hours. If the sample mean is 9 hours, then the 95 confidence interval is approximately _____.
 a. 7.04 to 110.96 hours
  b. 7.36 to 10.64 hours
  c. 7.80 to 10.20 hours
  d. 8.74 to 9.26 hours

Question 2

The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. What percent of players weigh between 180 and 220 pounds?
 a. 34.13
  b. 68.26
  c. 0.3413
  d. None of the answers is correct.


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jackie

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

d

Answer to Question 2

d


RODY.ELKHALIL

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Reply 2 on: Jun 24, 2018
:D TYSM

mochi09

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Reply 3 on: Yesterday
Excellent

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