"an insurance company’s procedure for settling a claim under $10,000 for fire or water damage to a home owner is to require two estimates for cleanup and repair of structural damage before allowing the insured to proceed with the work. the insurance company compares estimate from two contractors who most frequently handle this type of work in this geographical area. assume the contractor estimates are normally distributed. data for the 10 most recent claims for which damage estimates were provided by both contractors in cells e3 to g13 with labels in first row. at the 5% level of significance, is there a difference between the two contractors? " what is the null hypothesis what is the alternative hypthoesis what is the test statistic? place output in cell a8 -2.318963855 what is the p value what is the conclusion

claim contractor a contractor b
smith, c. 5,500 6,000
jones, a 1,000 900
xia, y 2,500 2,500
gallileo, a 7,800 8,300
carson, r. 6,400 6,200
tracy, l. 8,800 9,400
barnes, c. 600 500
van davis, r. 3,300 3,500
jones, b 4,500 5,200
thomas, p. 6,500 6,800

Exercise 18-15 sheffield appliance center is an experienced home appliance dealer. sheffield appliance center also offers a number of services for the home appliances that it sells. assume that sheffield appliance center sells ovens on a standalone basis. sheffield appliance center also sells installation services and maintenance services for ovens. however, sheffield appliance center does not offer installation or maintenance services to customers who buy ovens from other vendors. pricing for ovens is as follows. oven only $790 oven with installation service 850 oven with maintenance services 970 oven with installation and maintenance services 990 in each instance in which maintenance services are provided, the maintenance service is separately priced within the arrangement at $180. additionally, the incremental amount charged by sheffield appliance center for installation approximates the amount charged by independent third parties. ovens are sold subject to a general right of return. if a customer purchases an oven with installation and/or maintenance services, in the event sheffield appliance center does not complete the service satisfactorily, the customer is only entitled to a refund of the portion of the fee that exceeds $790. assume that a customer purchases an oven with both installation and maintenance services for $990. (b) indicate the amount of revenue that should be allocated to the oven, the installation, and to the maintenance contract.

Choose the statement that is incorrect. a. search activity occurs only in markets where there is a shortage. b. when a price is regulated and there is a shortage, search activity increases. c. the time spent looking for someone with whom to do business is called search activity. d. the opportunity cost of a good is equal to its price plus the value of the search time spent finding the good.

Which of the following statements about revision is most accurate? (a) you must compose first drafts quickly (sprint writing) and return later for editing. (b) careful writers always revise as they write. (c) revision is required for only long and complex business documents. (d) some business writers prefer to compose first drafts quickly and revise later; others prefer to revise as they go.