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Consider a random sample of size 48 from a population with hypothesized mean 365.25 and s 5 22.3.
a. Write the four parts for a two-sided hypothesis test concerning the population mean with a = 0.05.
b. What assumptions are necessary in order for the test in part (a) to be appropriate?
c. Suppose the sample mean is x‾ = 360.0. Find the value of the test statistic, and draw a conclusion about the population mean.
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given below are the values taken from a normal population.21 23 25 27 28 35 30 32 33determine a 95 confidence
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At the 0.05 level of significance, can we reject the possibility that the interviewers are equally capable of obtaining interviews?
According to recent research from the PewFoundation, 91% of all American adults have cell phones of some type. Use the statistics given to determine the approximate number of American adults who would find giving up their phone more difficult than..
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