Two random samples of forces (in pounds) to pull spring A and spring B are given below, respectively: A: 105, 110, 129,

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Two Random Samples Of Forces In Pounds To Pull Spring A And Spring B Are Given Below Respectively A 105 110 129 1 (45.96 KiB) Viewed 18 times

Two random samples of forces (in pounds) to pull spring A and spring B are given below, respectively: A: 105, 110, 129, 126, 128, 139, 133, 135, 101, 113 B: 146, 149, 127, 128, 118, 149, 135, 140, 151, 142 Forces to pull spring A and B are both normally distributed and two samples are independent. (a) Compute sample mean and sample variance for each sample. (b) Construct a 90% confidence interval for variances are equal 0247 Then make a statistical inference whether or not two population (c) Using the result in (b), conduct a statistical hypothesis test if the average force to pull Spring B is 5 pounds higher than the average force to pull Spring A at significance level 0.1. Your test should include the null and alternative hypotheses, test statistic and critical region, computation and conclusion and p value. Write a complete sentence for your conclusion that is related to the background of this study.