In a survey conducted by a department store, 8 randomly chosen married couples w

Question

In a survey conducted by a department store, 8 randomly chosen married couples were asked to give a satisfaction index (0-100) based on their latest visits. The results of the survey are displayed below: Assume that the satisfaction indices for husbands and wives are normally distributed. Consider next the data for wives only. Find a 90%. two-sided CI for the mean satisfaction index for wives in the population. Suppose it is claimed that the mean satisfaction index for wives in the population is different from 60. Test the claim using the rejection region approach at 5% significance level. Interpret the result of the test. Consider now another claim that the mean satisfaction index for wives in the population is greater than 51.43. Using one of the statistical table(s) we have used so far, provide your best guess as to what the p-value for this test is.

Explanation / Answer

There are six parts of a test when using the rejection region approach:

One-proportion Z-test for ?

Step 0. Check the conditions for the one-proportion z-test to be valid:

Step 1. Set up the hypotheses as one of:

Step 2. Decide on the significance level, ? .

Step 3. Compute the value of the test statistic:

z=?

Two-tailed Right-tailed Left-tailed Ho : ? = ?o OR Ho : ? = ?o OR Ho : ? = ?o Ha : ? ? ?o Ha : ? > ?o Ha : ? < ?o

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.