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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A researcher compares the effectiveness of two different
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students using Method 2 produces a testing average of 58.5. Assume
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the population standard deviation for Method 2 is 17.38. Determine
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