One of the authors received a credit card bill for 3,036, but included a charge of 1,909 that was not valid. Find the values of the absolute and relative errors the absolute value is 1,909 what is the relative value?

The National Football League (NFL) records a variety of performance data for individuals and teams. To investigate the importance of passing on the percentage of games won by a team, the following data show the average number of passing yards per attempt (yds/att) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season (NFL website, February 12, 2012). Team                                                   YDS/ATT               […]

Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six and then find the probability that it is (2) more than 7. (1) 0.069 (2) 0.974 (1) 0.069 (2) 0.005 (1) 0.021 (2) 0.005 (1) 0.021 (2) 0.026 Say a business wants to know if each salesperson is equally likely to make a sale. The company chooses 5 salespeople and gathers information on their sales experiences. What assumption must be made for this […]

An industrial researcher is a consultant to a large chain of bookstores. Industry reports show that for book stores in general, the average number of complaints received by management for a 1-month period at this time of year is 6.5 (the variance is not known). Seven of this chain’s stores are randomly selected to keep records of complaints received over a 1-month period. The numbers of complaints are 4, 8, 9, 0, 3, 5, and 6. Does this chain get a different amount of complaints than book stores in general? (Use the .05 level). (a) Define variable of interest and […]

Question 1 Let x represent the number of pets in pet stores. This would be considered what type of variable: Nonsensical Continuous Lagging Discrete Question 2 Let x represent the number of players on a sports field. This would be considered what type of variable: Discrete Continuous Distributed Inferential Question 3 Consider the following table. Age GroupFrequency18-29983130-39784540-49686950-59632360-69541070 and over5279 If you created the probability distribution for these data, what would be the probability of 30-39? 18.9% 42.5% 16.5% 23.7% Question 4 Consider the following table. Weekly hours workedProbability1-30 (average=23)0.0831-40 (average=36)0.1641-50 (average=43)0.7251 and over (average=54)0.04 Find the mean of this variable. […]