Exam 17: Determination of Sample Size: A Review of Statistical Theory

If 206 people in a sample of 560 people say that they "liked a product" that they purchased during a test market study in Cincinnati,the proportion of people in this study who said that they liked this product was about:

Which of the following is a measure of the central tendency of a set of scores?

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

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

If the sample standard deviation is 10.5 and the sample mean is 48 based on a study with a sample size of 120,the 95 percent confidence interval about the mean is between approximately:

Which of the following is a measure of dispersion?

An estimate of the population mean in the form of a single value is called a(n)____________________.

Nicole has developed a set of data organized by summarizing the number of times a particular value of a variable occurs.This is an example of a:

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

The Statistical Abstract of the United States which is published each year by the federal government is an example of descriptive statistics.

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

The formula below is used to calculate the ____.

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

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

When a data set is summarized by counting the number of times each value for a variable occurs in the sample,this is known as a ____________________.

The confidence interval increases as the sample size,n,increases.

One of the most common probability distributions in statistics is the _____ distribution.

One hundred percent of the scores in a normal distribution fall within plus or minus two standard deviations of the mean.

Which of the following represents the standard deviation of the sampling distribution?

List the characteristics of the standardized normal distribution and explain why it is a useful distribution in inferential statistics.