Construct a stem-and-leaf diagram, Basic Statistics

Assignment Help:

An internal report issued by the marketing manager of a oil-change franchise claims that the mean number of miles between oil changes is for franchise customers is at least 3600 miles. One franchise owner suspects that the mean distance is actually less than 3600 miles. She collects a random sample of 10 customers, and determines the distance each had driven between oil changes. She finds the following results.

3655    3734    3700    1946    3208

3311    2789    3920    3555    3902

a) Construct a stem-and-leaf diagram.

b) Does your stem-and-leaf diagram  in (a) suggest that the distribution of distances is not normal? (For instance, is there any evidence that the distribution is skewed?)

c) Construct TWO 99% confidence intervals.  

(i) Use the z-tables.

(ii) Use the t-tables.

d) Interpret your result in (ii) in words.

e) You now must decide: is the mean distance between oil changes 3600 miles, or not? Explain your reasoning.

f) Which (if either) of the confidence intervals in (c) is appropriate? (Suggestion: look at your answer to (b).) Explain briefly.


Related Discussions:- Construct a stem-and-leaf diagram

Determine the upper and lower control limits, You should show your work to ...

You should show your work to earn partial credit.  You must show ALL of your work on the pages provided.  There should be plenty of room to show your work on the page with each pro

Correlation matrix, A. Complete the correlation matrix table. B. Which vari...

A. Complete the correlation matrix table. B. Which variable (s) has the highest correlation coeffieient which is not a perfect correlation? C. Which variable (s) has the lowest cor

Discuss the role that racism played in public policies, Discuss the role th...

Discuss the role that racism played in public policies related to urban housing throughout the twentieth century. Did this racism manifest itself solely on an individual level (i.e

research problem , The abstract is a one-paragraph [200-300 words] summary...

The abstract is a one-paragraph [200-300 words] summary of what will be presented in the paper. The content that is required for the abstract includes [1-2 sentences each component

Reply plz, order tomatoes in crates of 25 kg and he is able to stock a maxi...

order tomatoes in crates of 25 kg and he is able to stock a maximum of four crates or 100 kg of tomatoes. His experience taught him that the daily demand ranges from 0 to100 kg of

Business tax accounting , 1. Passive losses are fully deductible as long as...

1. Passive losses are fully deductible as long as they do not exceed $50,000 during the year. A) True B) False 2. Wages are considered "active income." A) True B) False 3. A de

Determine the probability - baye theorem, In a suburban community, 30% of t...

In a suburban community, 30% of the households use Brand A toothpaste, 27% use Brand B, 25% use Brand C, and 18% use Brand D. In the four groups of households, the proportions of r

accounting, Fenn Museum, a nongovernmental not-for-profit organization, ha...

Fenn Museum, a nongovernmental not-for-profit organization, had the following balances in its statement of functional expenses: Education $300,000 Fundraising 250,000 Management an

Financial evaluation of projects, Financial evaluation of projects The net ...

Financial evaluation of projects The net provide value of a venture is the provide value of future repayments reduced by the provide value of expenditures. The amount of lower pric

Write Your Message!

Captcha
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