Question

# A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...

A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 79 students using Method 1 produces a testing average of 67.2. A sample of 44 students using Method 2 produces a testing average of 58.5. Assume that the population standard deviation for Method 1 is 11.27, while the population standard deviation for Method 2 is 17.38. Determine the 95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.

Step 1 of 3 :

Find the point estimate for the true difference between the population means.

given data are:-  z critical value for 95% confidence level ,both tailed test be:- a).the point estimate for the true difference between the population means be:- b).the margin of error be:-   c).the 95% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.be:-   *** if you have any doubt regarding the problem please write it in the comment box.if you are satisfied please give me a LIKE if possible..