Test whether the mean time to assemble with the new method

Assignment Help Basic Statistics

Reference no: EM13634420

Q1:

Test whether the mean time to assemble with the new method is less than that for the old method ((Use t as test statistic)): The old assembly line method for assembling a product had a mean of 50 minutes. With a new assembling line method, for a random sample of 16 units of the product, bling time per unit of product is 48 minutes with a sample std. dev. 4 minutes. Using a level of significance of 0.05.

Q2:

Recent random sample of 36 janitors, the mean hourly rate was 13. In the past the hourly rate of janitors in a town had a mean of $12 and std. dev. of $3. Perform a test of hypothesis to investigate whether the mean hourly rate for janitors has changed in the town. Use 0.05 level of significance.

Reference no: EM13634420

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