n 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) 32 25 30 27 31 34 31 24 35 36 31 30 30 23 38 34 28 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.)
n 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) 32 25 30 27 31 34 31 24 35 36 31 30 30 23 38 34 28 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.)
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 32E
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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) | 32 | 25 | 30 |
| 27 | 31 | 34 | |
| 31 | 24 | 35 | |
| 36 | 31 | 30 | |
| 30 | 23 | 38 | |
| 34 | 28 |
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.)
(b) Find the critical value. (Give your answer correct to two decimal places.)
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