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

Index numbers, discuss the considerations to be borne in mind when construc...

discuss the considerations to be borne in mind when constructing index numbers

The correlation coefficient to identify collocations, Would there be a poss...

Would there be a possibility to use the correlation coefficient to identify collocations? Compare with the Chi2 test. • How could we maybe do that?

Angler survey, Angler survey A survey used by sport fishery managers t...

Angler survey A survey used by sport fishery managers to calculate the total catch, fishing effort and catch rate for the given body of water. For instance, the whole effort m

Impact of government regulation on managerial decision, Impact of governme...

Impact of government regulation on managerial Decision making Impact of government regulation on managerial Decision making how methods of control can influence market prices.

Quantitative research methods, I have four assignments that are due tomorro...

I have four assignments that are due tomorrow. Can you help?

Icmap, 03 (a) Explain the term capital rationing and suggest the criteria t...

03 (a) Explain the term capital rationing and suggest the criteria to be used in ranking projects under capital rationing. (05) (b) There are three projects X Y and Z having follow

Index numbers, Analyse the different types of index numbers numbers numbe...

Analyse the different types of index numbers numbers numbers and their benefit to the Differentialgleichungen business world.

Frequency distribution, hey goo day, i wanna know the definition of frequen...

hey goo day, i wanna know the definition of frequency distribution and how to conduct it like in examples?

Domain, select and list five items used to sample the domain in childhood o...

select and list five items used to sample the domain in childhood obesity

Definition of capital lease as a financial arrangement, Definition of capit...

Definition of capital lease in term of financial arrangement whereby a lessee pays rental for asset. Capital lease is a financial arrangement underlying a agreement where a lesse

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