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Use the values below to calculate the standard deviation of the sampling distribution of differences in sample means. Round to 2 decimal places. Pooled standard deviation , = 4.8 %3D Sample size group A: n = 30 Sample size group B: n = 45 A researcher conducted a study comparing the scores of two independent group. Group A had an n = 30, a sample mean of x = 20.8, and a sample standard deviation of s = 6.0. Group B had an n = 20, a sample mean of X = 15.9, and a sample standard deviation of s = 4.0. Assuming equal variances between the groups, calculate the lower bound of a 95% confidence interval of the difference in population means between Group A and Group B.

Use the values below to calculate the standard deviation of the sampling distribution of differences in sample means. Round to 2 decimal places. Pooled standard deviation , = 4.8 %3D Sample size group A: n = 30 Sample size group B: n = 45 A researcher conducted a study comparing the scores of two independent group. Group A had an n = 30, a sample mean of x = 20.8, and a sample standard deviation of s = 6.0. Group B had an n = 20, a sample mean of X = 15.9, and a sample standard deviation of s = 4.0. Assuming equal variances between the groups, calculate the lower bound of a 95% confidence interval of the difference in population means between Group A and Group B.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Use the values below to calculate the standard deviation of the sampling distribution of differences in sample means. Round to 2 decimal places. Pooled standard deviation d. = 4.8 Sample size group A: n = 30 Sample size group B: n = 45 A researcher conducted a study comparing the scores of two independent group. Group A had an n = 30, a sample mean of x = 20.8 , and a sample standard deviation of s = 6.0. Group B had an n = 20, a sample mean of = 15.9, and a sample standard deviation of s = 4.0. Assuming equal variances between the groups, calculate the lower bound of a 95% confidence interval of the difference in population means between Group A and Group B.
Transcribed Image Text:Use the values below to calculate the standard deviation of the sampling distribution of differences in sample means. Round to 2 decimal places. Pooled standard deviation d. = 4.8 Sample size group A: n = 30 Sample size group B: n = 45 A researcher conducted a study comparing the scores of two independent group. Group A had an n = 30, a sample mean of x = 20.8 , and a sample standard deviation of s = 6.0. Group B had an n = 20, a sample mean of = 15.9, and a sample standard deviation of s = 4.0. Assuming equal variances between the groups, calculate the lower bound of a 95% confidence interval of the difference in population means between Group A and Group B.
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