A researcher compares the effectiveness of two different instructional methods for teaching pharmacology. A sample of 49 students using Method 1 produces a testing average of 72.8. A sample of 31 students using Method 2 produces a testing average of 72.3. Assume that the population standard deviation for Method 1 is 6.29, while the population standard deviation for Method 2 is 15.7. Determine the 90% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?