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$1.00 Statistics help

  • From Mathematics: Statistics
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  • Due on Sep. 07, 2010
  • Asked on Sep. 06, 2010 at 10:14:15AM
Asked by :
Nurse2536
Nurse2536
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Q:

#1 Unit 6 Quiz

You wk for a consumer advocate agency and want to find the mean repair cost of a washing machine. As part of your study, you randomly select 55 repair costs and find the mean to be $110. The sample standard deviation is $19.70.

a. 90% of the mean confidence interval for the population of mean repair cost.

the 90% interval confidence is _____ , ______ (Round to two decimal places as needed).

b. Compare the amount of information the different sample sizes give about the population.

 

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  • Posted on Sep 06, 2010 at 5:35:46PM
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TutorKK
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