Chapter 2: Q. 28 (page 132)
On an exam, would it be more desirable to earn a grade with a high or low percentile? Explain
A high percentile would be more desirable because higher percentiles correspond to higher grades on the exam.
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Use the following information to answer the next six exercises. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars.
Third quartile = _______
The following data show the different types of pet food stores in the area carry. Calculate the sample mean and the sample standard deviation to one decimal place using a calculator.
What does the relative frequency column in Table sum to? Why?
What word describes a distribution that has two modes?
Use the following information to answer the next three exercises: Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars. Calculate the following:
median = _______
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