Chapter 14, Problem 14.4P

The owner of a moving company typically has their most experienced manager predict the total number of labor hours that will be required to complete an upcoming move.  The approach has proven useful in the past, but the owner has their business objective of developing a more accurate method of predicting labor hours.  In a preliminary effort to provide a more accurate method, the owner has decided to use the number of cubic feet moved as the independent variable and has collected data for 36 moves.  The data is seen below:     Hours Feet 24.00 545 13.50 400 26.25 562 25.00 540 9.00 220 20.00 344 22.00 569 11.25 340 50.00 900 12.00 285 38.75 865 40.00 831 19.50 344 18.00 360 28.00 750 27.00 650 21.00 415 15.00 275 25.00 557 45.00 1028 29.00 793 21.00 523 22.00 564 16.50 312 37.00 757 32.00 600 34.00 796 25.00 577…

At a large furniture and electrical​ store, customers usually find that the furniture on display is not held in stock. Rather than being immediately​ available, it must be sourced from manufacturers. In the sofa​ department, the average delivery time is expected to be six weeks after purchase. In order to test whether this target is​ accurate, the store records the delivery times​ (in days) taken for 50 sofa purchases. Complete parts​ (a) through​ (d).   LOADING... Click the icon to view the data table.       a. The supervisor claims that the mean number of days between receipt of the order and delivery of the sofa is 42 days or more. At the 0.05 level of​ significance, is there evidence that the claim is not true​ (that is, that the mean number of days is less than 42​)?   State the null and alternative hypotheses. Choose the correct answer below.     A. H0​: μ>42 H1​: μ<42   B. H0​: μ≠42 H1​: μ=42   C. H0​: μ≤42 H1​: μ>42   D. H0​:…

At a large furniture and electrical​ store, customers usually find that the furniture on display is not held in stock. Rather than being immediately​ available, it must be sourced from manufacturers. In the sofa​ department, the average delivery time is expected to be six weeks after purchase. In order to test whether this target is​ accurate, the store records the delivery times​ (in days) taken for 50 sofa purchases. Complete parts​ (a) through​ (d).   LOADING... Click the icon to view the data table.         a. The supervisor claims that the mean number of days between receipt of the order and delivery of the sofa is 42 days or more. At the 0.05 level of​ significance, is there evidence that the claim is not true​ (that is, that the mean number of days is less than 42​)?   State the null and alternative hypotheses. Choose the correct answer below.     A. H0​: μ>42 H1​: μ<42   B. H0​: μ≠42 H1​: μ=42   C. H0​: μ≤42 H1​: μ>42   D.…