In an Early Study,researchers at Ivy University Found That 33

question 125

Essay

In an early study,researchers at Ivy University found that 33 percent of the freshmen had received at least one A in their first semester.Administrators are concerned that grade inflation has caused this percentage to increase.In a more recent study,of a random sample of 500 freshmen,185 had at least one A in their first semester.Calculate the p-value associated with the test statistic and test the claim at α = .05.

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Definitions:

Confidence Interval

A range of values, derived from the statistical analysis of data, that is likely to include the true population parameter with a certain level of confidence.

Sample

A subset of individuals or observations from a population used to estimate parameters or statistics of the whole population.

Mean

The average of a set of numbers, calculated by summing them up and dividing by the number of summands.

Standard Deviation

A measure of the amount of variability or dispersion of a set of values around the mean.