You research repair costs of mobile devices and find that the population mean is $89.56. In Exercise
Question:
You research repair costs of mobile devices and find that the population mean is $89.56. In Exercise 20, does the t-value fall between -t0.95 and t0.95?
Data from exercise 20:
In a random sample of 12 mobile devices, the mean repair cost was $90.42 and the standard deviation was $33.6.
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Related Book For 
Elementary Statistics Picturing The World
ISBN: 9780134683416
7th Edition
Authors: Ron Larson, Betsy Farber
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