An employment agency wants to see which of three types of ads in the help-wanted section of local newspapers is the most effective. Three types of ads (big headlines, straightforward, and bold print) were randomly alternated over a period of weeks, and the number of people responding to the ads was noted each week. Type of Advertisement Big Headline Straightforward Bold Print Number of responses (replicates) 37 23 28 32 30 33 44 31 33 37 26 29 24 27 32 39 40 Do these data support the null hypothesis that there is no difference in the effectiveness of the ads, as measured by the mean number responding, at the .01 level of significance? (a) Find the test statistic. (Give your answer correct to two decimal places.) (b) Find the critical value. (Give your answer correct to two decimal places.) (c) State the appropriate conclusion. Reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads. Reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads. Fail to reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads. Fail to reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads.
An employment agency wants to see which of three types of ads in the help-wanted section of local newspapers is the most effective. Three types of ads (big headlines, straightforward, and bold print) were randomly alternated over a period of weeks, and the number of people responding to the ads was noted each week. Type of Advertisement Big Headline Straightforward Bold Print Number of responses (replicates) 37 23 28 32 30 33 44 31 33 37 26 29 24 27 32 39 40 Do these data support the null hypothesis that there is no difference in the effectiveness of the ads, as measured by the mean number responding, at the .01 level of significance? (a) Find the test statistic. (Give your answer correct to two decimal places.) (b) Find the critical value. (Give your answer correct to two decimal places.) (c) State the appropriate conclusion. Reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads. Reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads. Fail to reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads. Fail to reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
Related questions
Question
An employment agency wants to see which of three types of ads in the help-wanted section of local newspapers is the most effective. Three types of ads (big headlines, straightforward, and bold print) were randomly alternated over a period of weeks, and the number of people responding to the ads was noted each week.
Type of Advertisement | |||
Big Headline | Straightforward | Bold Print | |
Number of responses (replicates) | 37 | 23 | 28 |
32 | 30 | 33 | |
44 | 31 | 33 | |
37 | 26 | 29 | |
24 | 27 | 32 | |
39 | 40 |
Do these data support the null hypothesis that there is no difference in the effectiveness of the ads, as measured by the mean number responding, at the .01 level of significance?
(a) Find the test statistic. (Give your answer correct to two decimal places.)
(b) Find the critical value. (Give your answer correct to two decimal places.)
(c) State the appropriate conclusion.
(b) Find the critical value. (Give your answer correct to two decimal places.)
(c) State the appropriate conclusion.
Reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads.
Reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads.
Fail to reject the null hypothesis, there is significant evidence of a difference in effectiveness of the ads.
Fail to reject the null hypothesis, there is not significant evidence of a difference in effectiveness of the ads.
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