Label each of the following situations “P” if it isan example of parametric data

Question

Label each of the following situations “P” if it isan example of parametric data or “NP” if it is anexample of nonparametric data.

A.     A manufacturer produces a batch ofmemory chips (RAM) and measures the mean-time-between-failures(MTBF). The manufacturer then changes a manufacturing process andproduces another batch and again measures the MTBF. Did the changeto the process improve the MTBF? ____

B.     From a written survey where therespondents were asked to rate an individual on a scale of 1 to 5,one group rated an individual a 3.7, another group rated theindividual a 4.3. Is the difference statisticallysignificant? ____

C.     A catering company is buyingequipment in order to set up their own store. They have a choice oftwo ovens that they can purchase for the store. The used oven is$100 less than the new oven, but its heating calibration is off by20 degrees. Which one is a better buy for them? ____

D.     Jim Smith owns three real estateoffices in Anytown. He has decided to open one more office, but hecannot decide between Hometown or Uptown as the town where he wantsto locate. He will be comparing the mean number of homes sold perreal estate agent, and the mean commission percentage earned byagents in the two towns to make his decision. ____

E.     A study to determine if jobabsenteeism is distributed evenly over the week. ____

F.     Mel’s Diner has been surveyingtheir customers for the past couple of years about their diningexperience in the restaurant. The survey uses a scale of one tofive, five being best to indicate customer satisfaction.Mel’s customer satisfaction averaged 2.5 last year, but thisyear it is 2.9. Is this difference statisticallysignificant? ____

G.     Sally’s Beauty Salon justopened for business. Sally assigns the stylists customers on arotation basis so that everyone is kept busy all day. One monthafter she opened the salon, Sally’s customer count for eachstylist was (a) 20 customers; (b) 30 customers; (c) 15 customers;and (d) 25 customers. Has Sally been fair in how she allocatescustomers to each of the stylists? ____

H.     A comparison of salaries between maleand female employees in the same organization. ____

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