12.3 An educational psychologist would like to determine whether access to computers has an effect on grades for high school students. One group of n = 16 students has home room each day in a computer classroom in which each student is assigned a computer. A comparison group n = 16 has home room in a traditional classroom without computers. At the end of the school year, the average grade is recorded for each student. The data are as follows: Computer Home Room M = 86 SS = 1005 Traditional Classroom M = 82.5 SS = 1155 a. Is there a significant difference between the two groups? Use a two-tailed test with $\alpha = .05$.
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$H_0$: There is no significant difference between the two groups. $H_1$: There is a significant difference between the two groups. Show more…
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An educational psychologist would like to determine whether access to computers has an effect on grades for high school students. One group of n = 16 students has home room each day in a computer classroom which each student has a computer. A comparison group of n = 16 students has home room in a traditional classroom. At the end of the school year, the average grade was recorded for each student. The data are as follows: Computer Traditional M=86 M=82.5 SS=1005 SS=1155 ⦁ Is there a significant difference between the two groups on school performance? Use a two-tailed test with α = .05. ⦁ Conduct a 95% confidence interval for the population mean difference between a computer classroom and a regular classroom. ⦁ Compare your hypothesis test decision and the confidence interval result. Are they consistent with each other? Please explain.
Ana Carolina D.
An educational psychologist would like to determine whether access to computers has an effect on grades for high school students. One group of n = 16 students has homeroom each day in a computer classroom where each student has a computer. A comparison group of n = 16 students has homeroom in a traditional classroom. At the end of the school year, the average grade was recorded for each student. The data are as follows: Computer: M = 86 SS = 1005 Traditional: M = 82.5 SS = 1155 - Is there a significant difference between the two groups on school performance? Use a two-tailed test with α = 0.05. - Conduct a 95% confidence interval for the population mean difference between a computer classroom and a regular classroom. - Compare your hypothesis test decision and the confidence interval result. Are they consistent with each other? Please explain.
An educational psychologist would like to determine whether access to computers has an effect on grades for high school students. One group of n = 16 students has homeroom each day in a computer classroom where each student has a computer. A comparison group of n = 16 students has homeroom in a traditional classroom. At the end of the school year, the average grade was recorded for each student. The data are as follows: Computer: Traditional: M = 86 M = 82.5 SS = 1005 SS = 1155 A) Is there a significant difference between the two groups on school performance? Use a two-tailed test with α = .05. B) Conduct a 95% confidence interval for the population mean difference between a computer classroom and a regular classroom. (1 pt.) C) Compare your hypothesis test decision and the confidence interval result. Are they consistent with each other? Please explain. (0.5 pt.)
Lucas F.
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