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

Asked in genpact interview, Expenses a/c. Dr. To vendor a/c. Cr. What is a...

Expenses a/c. Dr. To vendor a/c. Cr. What is an impact of this transaction on business

Limitation of the financial accounting, Limitation of the Financial Account...

Limitation of the Financial Accounting. There much limitation can be considered in case of the Financial Accounting but here we are discussing the main two limitations  It re

.two functions of accounting, Two functions of Accounting. Accounting Pu...

Two functions of Accounting. Accounting Purchase only:  In the guides of Records only a transaction which is relevant to some cash value can be registered.  Posting: The Expl

Calculate maximize total profit next quarter, Please show your work to rece...

Please show your work to receive credit for this question.. Harkin Electronics is planning its production next quarter for its two product lines, relays and capacitors.  The pro

Calculate the maximum hourly rate, Question: Sharp Discounts Who...

Question: Sharp Discounts Wholesale Club has two service desks with one server at each desk.  There is one desk at each entrance of the store.  Customers arrive at each

Calculate strengths and weaknesses , In the 2009 baseball season, the team ...

In the 2009 baseball season, the team that finished the regular season with the best record in the National League was the Los Angeles Dodgers, with a record of 95-67. (For those o

Conversion bonds, i need problems and their answers in a simplified way to ...

i need problems and their answers in a simplified way to understand the material because im really having troubles understanding how to solve conversion bonds and share warrants pr

Angular histogram, Angular Histogram A method or technique for displayin...

Angular Histogram A method or technique for displaying the circular data, which involves the wrapping of the usual histogram around a circle. Each bar in the histogram is center

Group project in statistics, I) Introduction 1) Topic (s) 2) Survey Questi...

I) Introduction 1) Topic (s) 2) Survey Question 3) Type of Sampling 4) Why? II) Calculations 1) Data Analysis (Charts, sample mean, sample standard deviation) 2) Probability 3) E

Time series, discuss the nature and causes of the components of an economic...

discuss the nature and causes of the components of an economic time series?

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