Parametric and Nonparametric DataIdentification Assignment Label each of the fol
ID: 2914866 • Letter: P
Question
Parametric and Nonparametric DataIdentification Assignment
Label each of the following situations “P” if it isan example of parametric data or “NP” if it is anexample of nonparametric data.
1. A manufacturer produces abatch of memory chips (RAM) and measures themean-time-between-failures (MTBF). The manufacturer then changes amanufacturing process and produces another batch and again measuresthe MTBF. Did the change to the process improve theMTBF? __P__
2. From a written surveywhere the respondents were asked to rate an individual on a scaleof 1 to 5, one group rated an individual a 3.7, another group ratedthe individual a 4.3. Is the difference statisticallysignificant? ____
3. A catering company isbuying equipment in order to set up their own store. They have achoice of two ovens that they can purchase for the store. The usedoven is $100 less than the new oven, but its heating calibration isoff by 20 degrees. Which one is a better buy forthem? ____
4. Jim Smith owns three realestate offices in Anytown. He has decided to open one more office,but he cannot decide between Hometown or Uptown as the town wherehe wants to locate. He will be comparing the mean number of homessold per real estate agent, and the mean commission percentageearned by agents in the two towns to make hisdecision. ____
5. A study to determine ifjob absenteeism is distributed evenly over the week. ____
6. Mel’s Diner hasbeen surveying their customers for the past couple of years abouttheir dining experience in the restaurant. The survey uses a scaleof one to five, 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? ____
7. Sally’s BeautySalon just opened for business. Sally assigns the stylistscustomers on a rotation basis so that everyone is kept busy allday. One month after she opened the salon, Sally’s customercount for each stylist was (a) 20 customers; (b) 30 customers; (c)15 customers; and (d) 25 customers. Has Sally been fair in how sheallocates customers to each of the stylists? ____
8. A comparison of salariesbetween male and female employees in the sameorganization. ____
Explanation / Answer
1. A manufacturer produces a batch of memory chips (RAM) andmeasures the mean-time-between-failures (MTBF). The manufacturerthen changes a manufacturing process and produces another batch andagain measures the MTBF. Did the change to the process improve theMTBF? _NP_ I agree ------------------------------------------------- 2. From a written survey where the respondents were asked to ratean individual on a scale of 1 to 5, one group rated an individual a3.7, another group rated the individual a 4.3. Is the differencestatistically significant? __P__ If the rating scale is continuous the answer would be NP. If thescale is discreet the answer would be P. I believe the answer is NP but would say that the description isambiguous. ------------------------------------------------ 3. A catering company is buying equipment in order to set up theirown store. They have a choice of two ovens that they can purchasefor the store. The used oven is $100 less than the new oven, butits heating calibration is off by 20 degrees. Which one is a betterbuy for them? ____ I see no way of performing this test with parameters. I would sayNP. -------------------------------------------------- 4. Jim Smith owns three real estate offices in Anytown. He hasdecided to open one more office, but he cannot decide betweenHometown or Uptown as the town where he wants to locate. He will becomparing the mean number of homes sold per real estate agent, andthe mean commission percentage earned by agents in the two towns tomake his decision. _P_ I agree --------------------------------------------------- 5. A study to determine if job absenteeism is distributed evenlyover the week. _NP_ I think it would be a parametric test withP(monday)=P(tuesday)...=P(friday) I say "P". ---------------------------------------------------- 6. Mel’s Diner has been surveying their customers for thepast couple of years about their dining experience in therestaurant. The survey uses a scale of one to five, five being bestto indicate customer satisfaction. Mel’s customersatisfaction averaged 2.5 last year, but this year it is 2.9. Isthis difference statistically significant? ____ I think "P". --------------------------------------------------- 7. Sally’s Beauty Salon just opened for business. Sallyassigns the stylists customers on a rotation basis so that everyoneis kept busy all day. One month after she opened the salon,Sally’s customer count for each stylist was (a) 20 customers;(b) 30 customers; (c) 15 customers; and (d) 25 customers. Has Sallybeen fair in how she allocates customers to each of the stylists?____ This would be a test of equal proportions. I say "P". -------------------------------------------------------- 8. A comparison of salaries between male and female employees inthe same organization. _P__ I agree.
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