Question

Suppose that sample results representative of the times for ABC Airline and XYZ Airline to locate flight information on their Internet web sites are as follows: ABC: Sample Mean = 2.6 minutes Sample Standard Deviation = 0.9 minutes Sample Size = 12 XYZ: Sample Mean = 2.4 minutes Sample Standard Deviation = 1.2 minutes Sample Size = 16 Find the 95% confidence interval for the difference between the population means, assuming the population variances are equal.

Name: suppose that sample results representative of the times for abc airline and xyz airline to locate flight information on their internet web sites are as follows abc sample mean 26 minutes sam 57883
Uploaded: 2023-06-02T22:11:27-08:00
Duration: 1 min 22 s
Channel: Kari Hasz
Description: suppose that sample results representative of the times for abc airline and xyz airline to locate flight information on their internet web sites are as follows abc sample mean 26 minutes sam 57883

          Suppose that sample results representative of the times for ABC Airline and XYZ Airline to locate flight information on their Internet web sites are as follows:
ABC:
Sample Mean = 2.6 minutes
Sample Standard Deviation = 0.9 minutes
Sample Size = 12
XYZ:
Sample Mean = 2.4 minutes
Sample Standard Deviation = 1.2 minutes
Sample Size = 16
Find the 95% confidence interval for the difference between the population means, assuming the population variances are equal.

Added by Kim O.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Kari Hasz

06/02/2023

Step 1

To find the 95% confidence interval for the difference between the population means of ABC Airline and XYZ Airline, we will follow these steps: Show more…

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Suppose that sample results representative of the times for ABC Airline and XYZ Airline to locate flight information on their Internet web sites are as follows: ABC: Sample Mean = 2.6 minutes Sample Standard Deviation = 0.9 minutes Sample Size = 12 XYZ: Sample Mean = 2.4 minutes Sample Standard Deviation = 1.2 minutes Sample Size = 16 Find the 95% confidence interval for the difference between the population means, assuming the population variances are equal.