Question

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.

Answer 1

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:-

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