# Question

Rework Exercise 16.16 using the signed-rank test based on Table X.

In exercise

The following are the amounts of time, in minutes, that it took a random sample of 20 technicians to perform a certain task: 18.1, 20.3, 18.3, 15.6, 22.5, 16.8, 17.6, 16.9, 18.2, 17.0, 19.3, 16.5, 19.5, 18.6, 20.0, 18.8, 19.1, 17.5, 18.5, and 18.0. Assuming that this sample came from a sym-metrical continuous population, use the sign test at the 0.05 level of significance to test the null hypothesis that the mean of this population is 19.4 minutes against the alternative hypothesis that it is not 19.4 minutes. Perform the test using

(a) Table I;

(b) The normal approximation to the binomial distribution.

In exercise

The following are the amounts of time, in minutes, that it took a random sample of 20 technicians to perform a certain task: 18.1, 20.3, 18.3, 15.6, 22.5, 16.8, 17.6, 16.9, 18.2, 17.0, 19.3, 16.5, 19.5, 18.6, 20.0, 18.8, 19.1, 17.5, 18.5, and 18.0. Assuming that this sample came from a sym-metrical continuous population, use the sign test at the 0.05 level of significance to test the null hypothesis that the mean of this population is 19.4 minutes against the alternative hypothesis that it is not 19.4 minutes. Perform the test using

(a) Table I;

(b) The normal approximation to the binomial distribution.

## Answer to relevant Questions

The following are the amounts of money (in dollars) spent by 16 persons at an amusement park: 20.15, 19.85, 23.75, 18.63, 21.09, 25.63, 16.65, 19.27, 18.80, 21.45, 20.29, 19.51, 23.80, 20.00, 17.48, and 19.11. Assuming that ...In a random sample taken at a public playground, it took 38, 43, 36, 29, 44, 28, 40, 50, 39, 47, and 33 minutes to play a set of tennis. Use the signed-rank test at the 0.05 level of significance to test whether it takes on ...With reference to the signed- rank test, find the mean and the variance of the random variable whose values are given by T+ – T–. Calculate rS for the following data representing the statistics grades, x, and psychology grades, y, of 18 students: Rework Exercise 16.46 using the signed- rank test based on Table X. In exercise The following are the numbers of passengers carried on flights 136 and 137 between Chicago and Phoenix on 12 days: Use the sign test at the 0.01 ...Post your question

0