Use the Following Information to Answer the Question

question 40

Multiple Choice

Use the following information to answer the question. A statistics professor is interested in learning whether there is a positive association between number of posts by online students on a message board and the final class average in an online statistics course. The computer output below shows the results from a regression model in which the final class average was predicted by the number of message board posts. Assume that the conditions of the linear regression model are satisfied.

-Choose the correct decision regarding the null hypothesis and the correct conclusion. State your conclusion using a significance level of 5%.

• A)Fail to reject H0. There is enough evidence to conclude that the final class average is positively associated with the number of message board posts.
• B)Fail to reject H0. There is not enough evidence to conclude that the final class average is positively associated with the number of message board posts.
• C)Reject H0. There is enough evidence to conclude that the final class average is positively associated with the number of message board posts.
• D)Reject H0. There is not enough evidence to conclude that the final class average is positively associated with the number of message board posts.

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Definitions:

Herfindahl-Hirschman Index

A measure of market concentration to evaluate the level of competition within an industry.

Herfindahl-Hirschman Index

A measure used to determine the level of competition within an industry, calculated by summing the squares of the market shares for each firm within the industry.

Concentration Ratio

A measure used in economics to assess the degree of market concentration by calculating the market share of the largest firms within an industry.

Market Share

The proportion of total sales or revenue generated by a company within a particular market, compared to the total market size.