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A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of 241 students using Method 1 produces a testing average of 71.2. A sample of 247 students using Method 2 produces a testing average of 85.4. Assume the standard deviation is known to be 1246 for Method 1 and 9 59 for Method 2 Determine the 99% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 Step 1 of 2: Find the critical value that should be used in constructing the contidence interval. Answer How to Enter 4 Points m Tables Keypad Keyboard Shortcuts Prev Next US A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of 241 students using Method 1 produces a testing average of 71.2. A sample of 247 students using Method 2 produces a testing average of 85.4. Assume the standard deviation is known to be 12.46 for Method 1 and 9.59 for Method 2. Determine the 99 se contidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 Step 2 of 2: Construct the 99% confidence interval. Round your answers to one decimal place. Answer to free 4 Points A Tables Keypad Keyboard Shortcuts Lower endpoint Upper endpoint Prev Next US A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of 241 students using Method 1 produces a testing average of 71.2. A sample of 247 students using Method 2 produces a testing average of 85.4. Assume the standard deviation is known to be 12.46 for Method 1 and 9.59 for Method 2. Determine the 99 se contidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 Step 2 of 2: Construct the 99% confidence interval. Round your answers to one decimal place. Answer to free 4 Points A Tables Keypad Keyboard Shortcuts Lower endpoint Upper endpoint

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