11. Effect size and Cohen's d willing to pay more if the hamburger Tips Suppose a researcher is trying to understand whether people who purchase fast-food hamburgers would comes with a free cookie. Prior research suggests the mean amount customers say they are willing to pay for a hamburger is u = 2.72 and o = 0, 91. ips The researcher plans to conduct a study very similar to the prior research by selecting a sample of customers and asking them how much they are willing to pay for the hamburger. Before asking, however, he will tell the customer about the free cookie that will come with the hamburger. The researcher's null hypothesis is that the mean amount the customers are willing to pay when they are told about the free cookie is no different than the amount customers are willing to pay when they are not told they will receive a free cookie. The researcher's sample of 49 customers has a sample mean of M = 1.96. The test statistic for this sample mean is -5.85. Using a significance level of ing me a = .05, which of the following is the most appropriate statement of the result? (Hint: For a two-tailed test with a = .05 and o known, the boundaries of the critical region are always +1.96.) O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are willing to pay for a hamburger, z = -5.85, p < .05. O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to pay for a hamburger, z = -2.72, p < .05. O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are willing to pay for a hamburger, z = 1.96, p > .05. O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to pay for a hamburger, z = -5.85, p < .05. Compute the estimated Cohen's d to measure the size of the treatment effect. Note: Cohen's d is always reported as a positive value and reflects the proportion of the standard deviation that is affected by the treatment. Estimated Cohen's d = Using Cohen's criteria, the estimated Cohen's d indicates that telling customers they will receive a free cookie is associated with a in the amount they are willing to pay for the hamburger.
11. Effect size and Cohen's d willing to pay more if the hamburger Tips Suppose a researcher is trying to understand whether people who purchase fast-food hamburgers would comes with a free cookie. Prior research suggests the mean amount customers say they are willing to pay for a hamburger is u = 2.72 and o = 0, 91. ips The researcher plans to conduct a study very similar to the prior research by selecting a sample of customers and asking them how much they are willing to pay for the hamburger. Before asking, however, he will tell the customer about the free cookie that will come with the hamburger. The researcher's null hypothesis is that the mean amount the customers are willing to pay when they are told about the free cookie is no different than the amount customers are willing to pay when they are not told they will receive a free cookie. The researcher's sample of 49 customers has a sample mean of M = 1.96. The test statistic for this sample mean is -5.85. Using a significance level of ing me a = .05, which of the following is the most appropriate statement of the result? (Hint: For a two-tailed test with a = .05 and o known, the boundaries of the critical region are always +1.96.) O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are willing to pay for a hamburger, z = -5.85, p < .05. O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to pay for a hamburger, z = -2.72, p < .05. O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are willing to pay for a hamburger, z = 1.96, p > .05. O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to pay for a hamburger, z = -5.85, p < .05. Compute the estimated Cohen's d to measure the size of the treatment effect. Note: Cohen's d is always reported as a positive value and reflects the proportion of the standard deviation that is affected by the treatment. Estimated Cohen's d = Using Cohen's criteria, the estimated Cohen's d indicates that telling customers they will receive a free cookie is associated with a in the amount they are willing to pay for the hamburger.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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Question
11
Transcribed Image Text:11. Effect size and Cohen's d
willing to pay more if the hamburger
Tips
Suppose a researcher is trying to understand whether people who purchase fast-food hamburgers would
comes with a free cookie. Prior research suggests the mean amount customers say they are willing to pay for a hamburger is u = 2.72 and o = 0,91.
ips
The researcher plans to conduct a study very similar to the prior research by selecting a sample of customers and asking them how much they are
willing to pay for the hamburger. Before asking, however, he will tell the customer about the free cookie that will come with the hamburger.
The researcher's null hypothesis is that the mean amount the customers are willing to pay when they are told about the free cookie is no different
than the amount customers are willing to pay when they are not told they will receive a free cookie.
The researcher's sample of 49 customers has a sample mean of M = 1.96. The test statistic for this sample mean is -5.85. Using a significance level of
ing
me
a = .05, which of the following is the most appropriate statement of the result?
(Hint: For a two-tailed test with a = .05 and o known, the boundaries of the critical region are always +1.96.)
O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are
willing to pay for a hamburger, z = -5.85, p < .05.
O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to
pay for a hamburger, z = -2.72, p < .05.
O Telling customers they will receive a free cookie with their hamburger did not have a significant effect on the amount they say they are
willing to pay for a hamburger, z = 1.96, p > .05.
O Telling customers they will receive a free cookie with their hamburger had a significant effect on the amount they say they are willing to
pay for a hamburger, z = -5.85, p < .05.
Compute the estimated Cohen's d to measure the size of the treatment effect.
Note: Cohen's d is always reported as a positive value and reflects the proportion of the standard deviation that is affected by the treatment.
Estimated Cohen's d =
Using Cohen's criteria, the estimated Cohen's d indicates that telling customers they will receive a free cookie is associated with a
in the amount they are willing to pay for the hamburger.
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