Purchase Solution

Identifying the data as Parametric or Nonparametric Data

Not what you're looking for?

Ask Custom Question

Please help complete the following:

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. ____

Purchase this Solution
Solution Summary

This posting has eight situations where you have to classify the data as Parametric or Non-Parametric data. The solution firstly explains the three rules that would make the data parametric, and gives justification as to why each type of data was selected.

Solution Preview

Hi,
Lets look at the three rules that make data parametric:
In statistical terms a parameter is a statistic calculated from a set of data, e.g. a mean or a standard deviation are both parameters. In order to calculate parameters, and to use them in statistical analysis three assumptions must be tested against the data. The data is considered as parametric if these three assumptions are valid:

a. Can it be assumed that the data has been obtained from a population which is considered "normal" in the statistical sense. In other words if a sufficiently large sample of data was obtained from the population is it likely that it would be normally distributed. This may be known from similar research, but if not, and provided the sample is reasonably large, it may be possible to estimate from the sample whether this assumption is reasonable.

b. The populations from which the samples are drawn should have equal variances. This can be determined by inspection of the data, looking at the spread or standard deviation of the data. The F - test can also be used to test the hypothesis that the samples have been drawn from populations with the equal variance.

c. The data should be measured, at the very least, on an interval scale. Even this is not always easy to determine, but a useful "rule of thumb" is to compare two scores, (say) a 5 and a 10, and to ask yourself if a score of 10 means that there is exactly twice as much of that particular attribute compared with a score of 5. ...

Purchase this Solution
Free BrainMass Quizzes
Writing Business Plans

This quiz will test your understanding of how to write good business plans, the usual components of a good plan, purposes, terms, and writing style tips.

Understanding Management

This quiz will help you understand the dimensions of employee diversity as well as how to manage a culturally diverse workforce.

Operations Management

This quiz tests a student's knowledge about Operations Management

Marketing Research and Forecasting

The following quiz will assess your ability to identify steps in the marketing research process. Understanding this information will provide fundamental knowledge related to marketing research.

Organizational Behavior (OB)

The organizational behavior (OB) quiz will help you better understand organizational behavior through the lens of managers including workforce diversity.

View More Free Quizzes
Related BrainMass Solutions

  • Differentiate between parametric and nonparametric tests

    225754 Differentiate between parametric and nonparametric tests Differentiate between parametric and nonparametric tests Identify the data in the situations A-G as: + Numeric or Attribute Data + Parametric or Nonparametric + Briefly explain you

  • Parametric or Nonparametric Data

    P- Parametric data or NP - nonparametric data?

  • Advantages of Non-parametric Tests

    Nonparametric tests can be widely used under conditions when the data cannot be described by a simple probability distribution such as the Normal or Poisson distributions.

  • General Statistics on Research Design and Non-Parametric Tests

    The non parametric doesn't find the error that occurs in the data so, it may affect the outcome of a nonparametric test. 2) How might one adjust ratio data - properly - to make it fit the nonparametric test requirements (or should one try a parametric

  • PARAMETRIC -NONPARAMETRIC IDENTIFICATION

    228399 PARAMETRIC ~ NONPARAMETRIC IDENTIFICATION PARAMETRIC ~ NONPARAMETRIC IDENTIFICATION DQ: Differentiate between parametric and nonparametric tests Identify the data in the situations A-G as: + Numeric or Attribute Data + Parametric or Nonparametric

  • Statistical Power: Nonparametric vs Parametric

    622937 Statistical Power: Nonparametric vs Parametric How do nonparametric statistical tests compare to parametric tests in terms of statistical power? Nonparametric statistical tests are not as powerful than parametric statistical tests.

  • Parametric & Nonparametric Testing

    There are several strengths of both parametric as well as non parametric tests.

  • formal hypothesis testing

    The test statistic may be parametric or nonparametric. Only if a nonparametric test is used the population size usually has to be larger to achieve the same level of confidence that is used in parametric test.

  • Chi Square

    Nonparametric statistical procedures (like Chi Square) test hypotheses that do not require normal distribution or variance assumptions about the populations from which the samples were drawn and are designed for ordinal or nominal data.

  • Non-parametric tests

    Some non-parametric tests such as the chi square test use counts of how many of the observations in the data fall into categories. For example suppose we want to test if gender is related to whether or not a person smokes cigarettes.

View More Related Solutions