# Question: Each of fifteen 60 watt lightbulbs has been randomly placed into

Each of fifteen 60-watt lightbulbs has been randomly placed into an outlet for which the voltage is 3 volts below the line voltage, 2 volts below the line voltage, or equal to the line voltage. The following data are the lifetimes of the bulbs, expressed in days of continuous use. (Use data file XR12029.)

a. What are the null and alternative hypotheses for this test?

b. Use ANOVA and the 0.01 level of significance in testing the null hypothesis identified in part (a).

c. For each sample, construct the 95% confidence interval for the population mean.

a. What are the null and alternative hypotheses for this test?

b. Use ANOVA and the 0.01 level of significance in testing the null hypothesis identified in part (a).

c. For each sample, construct the 95% confidence interval for the population mean.

**View Solution:**## Answer to relevant Questions

Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven, have observed the following speed (mph) measurements for two random samples of ...Given the summary information in Exercise 12.33, verify the calculation of the 95% confidence interval for each of the treatment means. In exercise 12.33 A researcher has used a standard test in measuring the ...For a randomized block experiment in which there are three treatments and two blocks, the calculated value of F = MSTRyMSE is 16.1. Using the 0.05 level of significance, what conclusion would be reached? Based on the F ...Two different machine control-button configurations are being tested. Recognizing that some operators are faster than others, management uses seven operators as blocks, then has each operator carry out a standard operation ...In a two-way ANOVA experiment, factor A is operating on 3 levels, factor B is operating on 2 levels, and there are 2 replications per cell. If MSAyMSE = 5.35, MSByMSE = 5.72, and MSAByMSE = 6.75, and using the 0.05 level of ...Post your question