Step 1 of 2: Find the point estimate for the true difference between the population means. Step 2 of 2: Construct the 98%98% confidence interval. Round your answers to one decimal place.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
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Step 1 of 2: Find the point estimate for the true difference between the population means. Step 2 of 2: Construct the 98%98% confidence interval. Round your answers to one decimal place.
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 201 students using
Method 1 produces a testing average of 76.5. A sample of 244 students using Method 2 produces a testing average of 81.2. Assume that
the population standard deviation for Method 1 is 18.88, while the population standard deviation for Method 2 is 15.43. Determine the
98 % confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.
Transcribed Image Text:A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 201 students using Method 1 produces a testing average of 76.5. A sample of 244 students using Method 2 produces a testing average of 81.2. Assume that the population standard deviation for Method 1 is 18.88, while the population standard deviation for Method 2 is 15.43. Determine the 98 % confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.
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