Each box of Healthy Crunch breakfast cereal contains a coupon entitling you to a free package of garden seeds. At the He

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Each Box Of Healthy Crunch Breakfast Cereal Contains A Coupon Entitling You To A Free Package Of Garden Seeds At The He 1 (130.48 KiB) Viewed 28 times

Each box of Healthy Crunch breakfast cereal contains a coupon entitling you to a free package of garden seeds. At the Healthy Crunch home office, they use the weight of incoming mail to determine how many of their employees are to be assigned to collecting coupons and mailing out seed packages on a given day. (Healthy Crunch has a policy of answering all its mail on the day it is received.) Let x = weight of incoming mail and y = number of employees required to process the mail in one working day. A random sample of 8 days gave the following data. x (lb) 9 23 18 6 12 y (Number of employees) 8 12 10 5 18 23 25 14 13 16 In this setting we have Ex = 134, y = 86, £x² = 2592, Iy² = 1018, and Exy = 1605. (a) Find x, y, b, and the equation of the least-squares line. (Round your and y to two decimal places. Round your least-squares estimates to four decimal places.) x= 16.75 y 10.75 b= 0.4734 0.4734 Need (d): (d) Test the claim that the population correlation coefficient p is positive at the 1% level of significance. (Round your test statistic to three decimal places.) t = 5.482 X Need (G & H): (g) Find a 95% for the number of employees required to process mail for 11 pounds of mail. (Round your answer to two decimal places.) lower limit 6.17 x employees upper limit 9.88 x employees (h) Test the claim that the slope of the population least-squares line is positive at the 1% level of significance. (Round your test statistic to three decimal places.) t = 5.467 x Need (1): (i) Find an 80% confidence interval for ß and interpret its meaning. (Round your answers to three decimal places.) lower limit 6.937 upper limit 9.118 X - 2.8205 x