# Question

Explain when would you use the paired-samples procedure to make confidence intervals and test hypotheses.

## Answer to relevant Questions

Find the following confidence intervals for d, assuming that the populations of paired differences are normally distributed. a. n = 11, = 25.4, sd = 13.5, confidence level = 99% b. n = 23, = 13.2, sd = 4.8, confidence ...A company sent seven of its employees to attend a course in building self-confidence. These employees were evaluated for their self-confidence before and after attending this course. The following table gives the scores (on ...Refer to the information given in Exercise 10.4. Test at a 1% significance level if the two population means are different. n1 = 650 1 = 1.05 σ1 = 5.22 n2 = 675 2 = 1.54 σ1 = 6.80 A sample of 1000 observations taken from the first population gave x1 = 290. Another sample of 1200 observations taken from the second population gave x2 = 396. a. Find the point estimate of p1 – p2. b. Make a 98% ...A company that has many department stores in the southern states wanted to find at two such stores the percentage of sales for which at least one of the items was returned. A sample of 800 sales randomly selected from Store ...Post your question

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