Example 9.1 and Example 9.2

Finding a Large-Sample 95% Confidence Interval for  μ₁ - μ₂

Step 1:

Step 2:

Step 3 (results):

A Large-Sample Test of Hypothesis for  H_a: μ₁ ≠ μ₂

Step 1:

Step 2:

Step 3 (results):

Exercise 9.11

Finding a 95 % Small-Sample Confidence Interval for  μ₁ - μ₂

Step 1:

Step 2:

Step 3 (results):

A Small-Sample Test of Hypothesis for  H_a: μ₁ ≠ μ₂

Step 1:

Step 2:

Step 3 (results):

Example 9.6

Finding a 95% Confidence Interval for  π₁ - π₂

Step 1:

Step 2:

Step 3 (results):

A Test of Hypothesis for H_a: π₁ ≠ π₂

Step 1:

Step 2:

Step 3 (results):

Example 9.5

See the data in Table 9.5 on p. 504.

Finding a 95% Paired-Difference Confidence Interval for μ_d = (μ₁ - μ₂₎

_{Note: Typically, μ1 - μ2 = 0.}

Step 1 (entering the data, with seven rows shown):

Step 2 (creating List 3 by subtracting List 2 from List 1):

Step 3:

Step 4:

Step 5 (results):

A Paired-Difference Test of Hypothesis for  H_a: μ_d = (μ₁ - μ₂₎

Step 1 and Step 2 are the same as above.  Next we have Step 3:

Step 4:

Step 5 (results):