Answer to Question #93547 in Quantitative Methods for rashidsibir

Question

An experiment to compare the lifespan of four different brands of spark plug was carried out. Five spark plugs of each brand were used, and the number of miles used until failure as an indicator of lifespan was Following is part of the statistical results for a one-way ANOVA.

ANOVA Table

Source of variation

Sum of squares

df

Mean square error

F-value

Treatments

176.5

B

E

G

Error

A

C

F



Total

236.0

D


Find the missing values for A, B, C and D in the ANOVA table.
Perform the ANOVA test to check for significant differences among the population means of the four different brands of spark plugs. Use a 0.05 significance level to conduct the test. The test should include the following steps:
a. State the null hypothesis and alternative hypothesis.
b. Specify the significance level and rejection region.
c. Determine the value of test statistic F. [
d. Determine test decision regarding the null hypothesis.
e. State your conclusion

Answer 1

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