Question
A machine that puts corn flakes into boxes is adjusted to put an average of 15...
A machine that puts corn flakes into boxes is adjusted to put an
average of 15 ounces into each box, with standard deviation of 0.24
ounce. If a random sample of 13 boxes gave a sample standard
deviation of 0.36 ounce, do these data support the claim that the
variance has increased and the machine needs to be brought back
into adjustment? Use a 0.01 level of significance. Assume volume in
boxes is normally distributed.
Classify the problem as one of the following: Chi-square test of
independence or homogeneity, Chi-square goodness of fit, Chi-square
for testing σ2 or σ.
Chi-square goodness of fitChi-square for testing σ2 or σ Chi-square test of homogeneityChi-square test of independence
(i) Give the value of the level of significance.
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