Reference no: EM13241156
Parametric and Nonparametric Data Identification Assignment
Label each of the following situations “P” if it is an example of parametric data or “NP” if it is an example of nonparametric data.
1. A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF? ____
2. From a written survey where the respondents were asked to rate an individual on a scale of 1 to 5, one group rated an individual a 3.7, another group rated the individual a 4.3. Is the difference statistically significant? ____
3. A catering company is buying equipment in order to set up their own store. They have a choice of two ovens that they can purchase for the store. The used oven is $100 less than the new oven, but its heating calibration is off by 20 degrees. Which one is a better buy for them? ____
4. Jim Smith owns three real estate offices in Anytown. He has decided to open one more office, but he cannot decide between Hometown or Uptown as the town where he wants to locate. He will be comparing the mean number of homes sold per real estate agent, and the mean commission percentage earned by agents in the two towns to make his decision. ____
5. A study to determine if job absenteeism is distributed evenly over the week. ____
6. Mel’s Diner has been surveying their customers for the past couple of years about their dining experience in the restaurant. The survey uses a scale of one to five, five being best to indicate customer satisfaction. Mel’s customer satisfaction averaged 2.5 last year, but this year it is 2.9. Is this difference statistically significant? ____
7. Sally’s Beauty Salon just opened for business. Sally assigns the stylists customers on a rotation basis so that everyone is 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 Sally been fair in how she allocates customers to each of the stylists? ____
8. A comparison of salaries between male and female employees in the same organization. ____
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A recent article in a computer magazine suggested that the
: A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard dev..
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Twenty students randomly assigned to an experimental group
: Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a second group do not. After 6 months, both groups are tested on their knowledge
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Explain how rapid modernization can affect people of nation
: From your own readings, study, and personal experience, explain how rapid modernization can affect the people of an emerging nation, both for good and for ill. Support your postings with information drawn from a number of sources.
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You take a random sample of pizzas sold during a one hour
: You take a random sample of pizzas sold during a one hour period over the next week. Group 1 and Group 2 The results are shown in the table to the at the bottom of this. Does the ad campaign make a difference? Can you suggest a different methodology ..
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A catering company is buying equipment in order to set up
: A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between-failures (MTBF). The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF
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Written in opposition to slavery
: Both Frederick Douglass' autobiographical Narrative and Mark Twain's fictional Adventures of Huckleberry Finn were written in opposition to slavery. Compare thr passages of these two male authors and describe any similarities and/or differences you s..
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Find the proportion of male college students
: Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
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Find the probability that the sample mean will be less than
: Individual scores of a placement examination are normally distributed with a mean of 84.2 and a standard deviation of 12.8.
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During the mid 1800s-slave narratives
: During the mid 1800s, slave narratives became an important literary forum for abolitionists. The Narrative of the life of Frederick Douglass: An American Slave was written in first person, while the Narrative of Sojoumer Truth was in third person.
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