Question

Answer Preview Result Message - 23.0067 incorrect Close! Try keeping more accuracy in your calculation -16.1933 incorrect Closel Try keeping more accuracy in your calculation. At least one of the answers above is NOT correct. (1 point) Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below: - 35, 2 56.4, 8 ng 36, 1376 of the means Find a 90% confidence interval for the difference -23.0067 SM-H2 -16.1933

Answer 1

The statistic software output for this problem is:

Two sample T summary confidence interval: Hi : Mean of Population 1 2 : Mean of Population 2 V1 - H2 : Difference between two means (without pooled variances) 90% confidence interval results: Difference Sample Diff. Std. Err. DF L. Limit U. Limit 1 -2 -19.6 2.0350481 54.251294 -23.00551 -16.19449

The 90% CI is : (-23.00551 , -16.19449)