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From a random sample of 7 students in an introductory finance class that uses group-learning techniques, the mean examination score was found to be 77.94 and the sample standard deviation was 2.7. For an independent random sample of 8 students in another introductory finance class that does not use group-learning techniques, the sample mean and standard deviation of exam scores were 73.62 and 8.7, respectively. Estimate with 90% confidence the difference between the two population mean scores; do not assume equal population variances. E Click the icon to view the Student's t distribution table. The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)

From a random sample of 7 students in an introductory finance class that uses group-learning techniques, the mean examination score was found to be 77.94 and the sample standard deviation was 2.7. For an independent random sample of 8 students in another introductory finance class that does not use group-learning techniques, the sample mean and standard deviation of exam scores were 73.62 and 8.7, respectively. Estimate with 90% confidence the difference between the two population mean scores; do not assume equal population variances. E Click the icon to view the Student's t distribution table. The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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From a random sample of 7 students in an introductory finance class that uses group-learning techniques, the mean examination score was found to be 77.94 and the sample standard deviation was 2.7. For an independent random sample of 8 students in another introductory finance class that does not use group-learning techniques, the sample mean and standard deviation of exam scores were 73.62 and 8.7, respectively. Estimate with 90% confidence the difference between the two population mean scores; do not assume equal population variances. Click the icon to view the Student's t distribution table. The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)
Transcribed Image Text:From a random sample of 7 students in an introductory finance class that uses group-learning techniques, the mean examination score was found to be 77.94 and the sample standard deviation was 2.7. For an independent random sample of 8 students in another introductory finance class that does not use group-learning techniques, the sample mean and standard deviation of exam scores were 73.62 and 8.7, respectively. Estimate with 90% confidence the difference between the two population mean scores; do not assume equal population variances. Click the icon to view the Student's t distribution table. The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed.)
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