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

Self adaptive ga, During the execution of the search process, the whole pop...

During the execution of the search process, the whole populations are classified into subgroups by sufficiently analyzed the individuals' state. Each individual in a different subs

Define Accrued liabilities , Obligations showing the responsibility to pay ...

Obligations showing the responsibility to pay for solutions or products that have been suffered or obtained but not compensated for by the end of the sales interval.

SPSS, Assignments due 9/14/2012 Need pricing

Assignments due 9/14/2012 Need pricing

Compute the data using both Megastats and Excel Data, AA major razor blade ...

AA major razor blade manufacturer advertises that its twin-blade disposable razor “gets you lots more shaves” than any single-blade disposable razor on the market. A rival company

Marginal and absorption Costing Problem solving, can you provide me the pro...

can you provide me the problem with the solution base above?

Calculate a forecast using exponential smoothing, The Midwestern Manufactur...

The Midwestern Manufacturing Company (MMC) is a large manufacturer of electrical generators.  The firm has experienced demand for their generators as shown below: Year  Demand

Depreciation application procedure, Depreciation Application procedure. ...

Depreciation Application procedure. Under this technique devaluation is incurred immediately to the Resources Consideration for example if 10% of devaluation is being incurred o

Sampling, what are the methods of sampling

what are the methods of sampling

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