A Researcher Compares The Effectiveness Of Two Different Instructional Methods For Teaching Physiology. A Sample Of 178178 Students Using Method 1 Produces A Testing Average Of 54.454.4. A Sample Of 226226 Students Using Method 2 Produces A Testing Averag

匿名用户最后更新于 2021-12-01 19:18 数学类Mathematics

A researcher compares the effectiveness of two differentinstructional methods for teaching physiology. A sample of 178178students using Method 1 produces a testing average of 54.454.4. Asample of 226226 students using Method 2 produces a testing averageof 74.574.5. Assume the standard deviation is known to be18.5818.58 for Method 1 and 9.529.52 for Method 2. Determine the90%90% confidence interval for the true difference between testingaverages for students using Method 1 and students using Method2.

Step 2 of 2:

Construct the 90%90% confidence interval. Round your answers toone decimal place.

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