Determine qualitative and quantitative variables

Assignment Help Custom Essay
Reference no: EM13974767

Problem 1:

The cost of 14 models of digitals cameras at a camera specialty store during 2014 was as follows:

340 450 450 280 220 340 290 370 400 310 340 430 270 380

1. Compute mean, median, mode, first and third quartile.

2. Compute the variance, standard deviation, range, interquartile range, coefficient of variation, standard error of the mean and Z scores.

3. Determine whether or not there are outliers? Explain.

4. Determine whether or not the data are skewed? If so, how?

5. Based on the previous results what conclusions can you reach concerning the price of digital cameras at a camera specialty store during 2014.

6. Construct a 90%, 95%, 99% confidence interval for the population mean cost of digitals cameras.

7. Interpret the meaning of each interval.

8. What assumption do you need to make about the population of interest to construct the confidence intervals?

Problem 2:

Consider the sample data for plants A, B, C & D of the above company, which are tabulated in table 1. Test whether the four means are equal at the 5% level of significance. Perform a test that will compare all 4 means at once. We are not interested in pair-wise comparisons at this stage. Please show all the steps in your calculations.

Table 1:
A  B 
333 328 320 333
332 329 321 321
320 323 322 329
326 327 325 330
328 330 326 328
325 331 328 325
323 332 329 333
321 320 330 331
334 324 331 327
322 323 332
320 334






Problem 3:

Read the article (p. 221 - 225)

"Performance and duration differences between online and paper-pencil tests" and answer the questions below.

Part A.

1. Develop a 95% confidence interval using data from this study.

2. Perform a hypothesis testing using data from this study. (show all the the appropriate steps).

3. Suggest another statistical technique(s) for the purpose of this study. Explain.

Part B.

For this study briefly describe how the researcher draw conclusions from a sample about a population. Try to be as analytic as possible and use the comments bellow.

1. Determine (or define) the independent variable(s).

2. Determine (or define) the dependent variable(s).

3. Determine (or define) qualitative and quantitative variable(s).

4. Determine (or define) the sample and the population.

5. Describe the statistical method(s) being used and define inferential statistics. Interpret the meaning of p-value.


Attachment:- Article.rar

Verified Expert

The solution in word document with 6-7 Pages contains all the required calculations answering all the solution of given problems along with the Sub Parts.

Reference no: EM13974767

Present a perspective on the time managment

Present a perspective on the following:Time Managment, essay writing skills and online communication skills. Describe how you can use each of these 3 topics to succeed in your

Describe the major features of the mongol empire

Based on your reading of Jack Weatherford's Genghis Khan and the Making of the Modern World, describe the major features of the Mongol Empire and how the Pax Mongolica shape

Strategies used by a business organization

Write an Essay on Topic Strategies for competitive global marketing in a business organization. Your essay should target on Strategies used by a business organization to becom

How do you feel outdoor leadership is important

Describe in detail an outdoor experience you have had that was significant to you in some way. What was positive about it? What was negative? What did you learn from the e

Essay discussing whether

Write an essay discussing whether or not the phrase "under God" should be allowed to remain in the pledge of allegiance generally, and more specifically if it should be recite

Discuss the problem of this double whammy

MP0663 - Gender, Media and Society. Stereotypes of gender are further complicated by the combination of other types of personal characteristic such as race, disability and ag

Should the so-called recreational drug

The topic will be about :Should the So-Called Recreational Drug, marijuana be legalized in the U.S.? I want you to write about it and doresearch the topic and write a position

Y grad school admission essay.

y grad school admission essay. Choose one of the following (about 750 words): 1. Tell us about a time when you tried to reach a goal or complete a task that was challenging, d


Write a Review

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd