American households spent an average of about $68 in 2007 on halloween merchandise such as costumes, decorations and candy. to see if this number had changed, researchers conducted a new survey in 2008 before industry numbers were reported. the survey included 1,500 households and found that average halloween spending was $58 per household.
the sample mean is dollars, while the claimed population mean is dollars.

Aproduction line has three machines a, b, and c, with reliabilities of .96, .86, and .85, respectively. the machines are arranged so that if one breaks down, the others must shut down. engineers are weighing two alternative designs for increasing the line’s reliability. plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. in either case, three machines (a, b, and c) would be used with reliabilities equal to the original three. a. compute overall system reliability under plan 1. (round your intermediate calculations and final answer to 4 decimal places.) reliability b. compute overall system reliability under plan 2. (round your intermediate calculations and final answer to 4 decimal places.) reliability c. which plan will provide the higher reliability? plan2plan1

The food services division of cedar river amusement park inc. is studying the amount families who visit the amusement park spend per day on food and drink. a sample of 40 families who visited the park yesterday revealed they spent the following amounts: see worksheet 1 for data and answer the following questions: a. organize the data into a frequency distribution, using seven classes and 15 as the lower limit of the first class. what class interval did you select? b. what percent of families spent less than $45? c. what percent of families spent $55 or more? d. how many families spent from $65 to 74.99?

Globalman tech purchased raw material from newbiztr co. when the sales team at newbiztr co checked the system, there was no payment detail in the system, though the order-delivery details were present. also, it seemed that someone had tampered with the details of the previous order. which important data-management features were compromised? the of data was compromised because there were corresponding payment details. the of data was compromised as someone had tampered with the details of the previous order.