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In a random sample of 40 refrigerators, the mean repair cost was $145.00 and the population standard deviation is $15.70. Construct a 90% confidence interval for the population mean repair cost.
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Complete parts (a) and (b) using the probability distribution below. The number of overtime hours worked in one week per employee Overtime hours 0 1 2 3 4 5 6 Probability 0.016 0.063 0.178 0.283 0.220 0.173 0.067 Find t ...
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The height of woman ages 20-29 is normally distributed , with a mean of 64.3 inches. assuming the standard diviation = 2.4 inches. are you more likely to randomly select 1 woman with a height less than 66.2 inches or are ...
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A fair die is rolled 36 times. What is the standard deviation of the even number (2, 4, or 6) outcomes?
A random sample of 77 eighth grade? students' scores on a national mathematics assessment test has a mean score of 290. This test result prompts a state school administrator to declare that the mean score for the? state' ...
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