A social worker was interested in determining whether there is a significant difference in the average monthly cost per child for childcare outside the home between state supported facilities and privately owned facilities. Two independent random samples were selected yielding the following information. State supported Facilities Privately owned Facilities Sample Size 64 64 Sample Mean 725 675 Sample Standard Deviation 95 80 Based on the 90% confidence interval for the true mean difference in average cost of children (state supported - privately owned), can one conclude that there is a difference in the average cost of children between the state supported facilities and privately owned facilities? Group of answer choices A. 90% CI is (-7.28, 52.72). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities. B. 90% CI is (-7.28, 52.72). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. C. 90% CI is (24.46, 75.54). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. D. 90% CI is (24.46, 75.54). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities.
A social worker was interested in determining whether there is a significant difference in the average monthly cost per child for childcare outside the home between state supported facilities and privately owned facilities. Two independent random samples were selected yielding the following information. State supported Facilities Privately owned Facilities Sample Size 64 64 Sample Mean 725 675 Sample Standard Deviation 95 80 Based on the 90% confidence interval for the true mean difference in average cost of children (state supported - privately owned), can one conclude that there is a difference in the average cost of children between the state supported facilities and privately owned facilities? Group of answer choices A. 90% CI is (-7.28, 52.72). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities. B. 90% CI is (-7.28, 52.72). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. C. 90% CI is (24.46, 75.54). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. D. 90% CI is (24.46, 75.54). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities.
A social worker was interested in determining whether there is a significant difference in the average monthly cost per child for childcare outside the home between state supported facilities and privately owned facilities. Two independent random samples were selected yielding the following information. State supported Facilities Privately owned Facilities Sample Size 64 64 Sample Mean 725 675 Sample Standard Deviation 95 80 Based on the 90% confidence interval for the true mean difference in average cost of children (state supported - privately owned), can one conclude that there is a difference in the average cost of children between the state supported facilities and privately owned facilities? Group of answer choices A. 90% CI is (-7.28, 52.72). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities. B. 90% CI is (-7.28, 52.72). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. C. 90% CI is (24.46, 75.54). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities. D. 90% CI is (24.46, 75.54). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities.
A social worker was interested in determining whether there is a significant difference in the average monthly cost per child for childcare outside the home between state supported facilities and privately owned facilities. Two independent random samples were selected yielding the following information.
State supported Facilities
Privately owned Facilities
Sample Size
64
64
Sample Mean
725
675
Sample Standard Deviation
95
80
Based on the 90% confidence interval for the true mean difference in average cost of children (state supported - privately owned), can one conclude that there is a difference in the average cost of children between the state supported facilities and privately owned facilities?
Group of answer choices
A. 90% CI is (-7.28, 52.72). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities.
B. 90% CI is (-7.28, 52.72). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities.
C. 90% CI is (24.46, 75.54). One can conclude that there is no difference in the average cost of childcare between the state supported facilities and privately owned facilities.
D. 90% CI is (24.46, 75.54). One can conclude that there is a difference in the average cost of childcare between the state supported facilities and privately owned facilities.
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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