Step 1 of 4: Find the mean of the paired differences, d‾. Round your answer to one decimal place. Step 2 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Step 3 of 4: Find the standard deviation of the paired differences to be used in constructing the confidence interval. Round your answer to one decimal place Step 4 of 4: Construct the 98% confidence interval. Round your answers to one decimal place
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
The U.S. Census Bureau collects data on the ages of married people. Suppose that eight married couples are randomly selected and have the ages given in the following table. Determine the 98%confidence interval for the true mean difference between the ages of married males and married females.
Let d=(age of husband)−(age of wife). Assume that the ages are
| Husband | 51 | 28 | 39 | 25 | 31 | 35 | 59 | 41 |
|---|---|---|---|---|---|---|---|---|
| Wife | 60 | 26 | 36 | 33 | 26 | 43 | 64 | 50
|
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