Module 4 Quiz

The value of the product-moment coefficient of correlation ranges from:

- 1.0 to 1.0

A regression equation for the relationship between sales and price is written as: Sales - 100 - 10*Price ($) + Error What is the change in Sales for every dollar increase in price?

-10

Following are satisfaction scores from a survey of 10 customers. 3, 6, 2, 1, 4, 5, 3. 7. 6. 4 What is the median satisfaction score?

4

A researcher creates a cross-tabulation table of two variables, education (college educated or not) and annual income (above $50,000 or not). She wants to determine if there is any association between the variables. An appropriate test to determine this is:

Chi-square

A researcher is interested in analyzing a set of nominal data to determine if the observed pattern of frequencies corresponds to the expected pattern. The appropriate statistical technique is

Chi-square goodness-of-fit

A researcher conducts a Chi-square test and discovers that the Chi-square value is significant at the 0.001 level. This indicates that the variables included in the analysis are completely independent (no association) of each other.

False

A relationship between X and Y is negative when _____ in X are associated with _____ in Y.

Increases: decreases

Which types of measurement are used to group respondents or objects into groups or categories and are thus referred to as categorical measures?

Nominal and ordinal

A research study that tests the hypothesis. "The population mean household income in the new market area is different from $29,000," will involve a/n:

One sample t-test

The statistical procedure that results in predictions with the lowest sum of squared differences between actual and predicted values in a regression equation is called:

Ordinary Least Squares (OLS)

An analyst has a set of normally distributed interval-scaled data resulting from observations on the same sample of subjects, and he wishes to investigate if there is any difference in these two means. The appropriate statistical procedure is:

Paired sample t-test.

A sales manager wants to know the effectiveness of a training program for his sales team. A group of salespeople were tested on their product knowledge before and after the training program. What type of t-test should be done if the sales manager wants to know whether the test scores (before and after) are statistically different from each other or not?

Paired samples t-test

The formula for a straight line is Y = a + bX, where 'b' stands for :

The slope

Suppose you were given an example of running a chi-square test using SPSS. The output shows a "Pearson Chi-Square" value of 82.123, df - 3 and the Asymp. Sig. - 0.001. Assuming an alpha of 1%, what does this SPSS output indicate?

There is a significant relationship

In a gender study related to income, the null hypothesis is:

There is no difference in income between men and women

A researcher plots a scatter diagram of two variables. The dots on the plot are scattered roughly as a circle. This indicates that the relationship (covariation) between the two variables is:

Very close to zero

Which statistical technique should you use to answer the question: "Is there a significant relationship between education level (a four-category ordinal variable) and whether or not consumers are aware that Firestone is a brand of tires?"

Chi-square test

A researcher discovers that as a retail store increases sales promotions, sales go up. However, after a certain point, any further increase in sales promotion results in a decrease in sales. This kind of relationship is best described as:

Curvilinear

When we say that a relationship is "either positive or negative," this is another way of emphasizing the ...... of the relationship.

Direction