Need help on getting the hypotheses, test statistic and value, p-value, conclusion

timer Asked: Dec 15th, 2014

Question description

While running some quality control tests, a manager at a factory that makes potato chips noticed a difference in the mean bag weights for chips coming from two different production lines. He randomly selected 20 bags from Line A and found a mean weight of 309.63 grams and a standard deviation of 15.91 grams. He randomly selected 15 bags from Line B and found a mean weight of 311.87 grams and standard deviation of 13.21 grams. If he assumes that population variances for the two lines are not equal, can he conclude at the 0.10 level that the mean weight of bags from Line A is lower than the mean weight of bags from Line B?

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