Allstate Batteries advertises and sells a 4 year (48 months) battery. You work at Consumer Digest, a consumer advocacy o

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Allstate Batteries Advertises And Sells A 4 Year 48 Months Battery You Work At Consumer Digest A Consumer Advocacy O 1 (31.63 KiB) Viewed 24 times

Allstate Batteries advertises and sells a 4 year (48 months) battery. You work at Consumer Digest, a consumer advocacy organization, and have been receiving complaints from consumers who felt they were not receiving their full 48 months. Test Allstate's claim that these are 48 month batteries at the 5% level of significance. You have tested a sample of 36 cars and found a mean of 45months and a standard deviation of 1 month. State the appropriate hypotheses from the consumers' point of view, show drawing and appropriate critical value, compute the appropriate test statistic, accept(fail to reject)/reject the null hypothesis and draw conclusion. Do you believe the batteries are as advertised? H: H: Construct a 99% confidence interval for the unknown mean. A random sample of n=81 Raisin Bran Cereal boxes were tested and was found to have a mean of 65 raisins with a standard deviation of 3 raisins. Assume the distribution of raisins per box is normally distributed. Does this mean the confidence interval is 99% correct? Explain.