Exam 13: Big Data Basics: Describing Samples and Populations

The formula below is used to calculate the ____.

Suppose a population mean is assumed to be 20 and the sample standard deviation is 5. Then, a score of 15 would have a Z-value of approximately ____.

When a researcher wants to estimate national market share based on the results of the test market for a new product in St. Louis and Kansas City, this is an example of:

The following formula is used to compute ____.

The ____________________ distribution is bell shaped.

The value below which half the values in a distribution fall is the ____.

A frequency distribution of a sample is called a(n) ____________________.

Find the approximate standard deviation of the following set of scores: 3, 6, 2, 7, 8.

Explain the central-limit theorem and discuss why it is useful to marketing researchers.

Population parameters are computed from sample data.

Percentage frequency is the long-run relative frequency with which an event will occur.

When you add up a set of scores and divide the result by the number of scores, you have determined the ____________________ of the distribution.

The percentage of elements that meet some criterion is referred to as the ____________________.

The mode is the measure of central tendency that identifies the value that occurs most often.

Which of the following is not a measure of the central tendency of a set of scores?

The value of Z is computed by the formula: Z = (X - $\mu$ )/ $\sigma$ .

An estimate of the population mean in the form of a single value, usually the sample mean, is called a ____.

In computing a 95 percent confidence interval about a proportion for a sample size of 40, the appropriate Z-value to be used is ____________________.

The standard deviation of the sampling distribution is called the ____________________ of the mean.

The simplest measure of the dispersion of a set of scores is the ____________________.