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

State the profit maximization problem of firm, Consider two firms producing...

Consider two firms producing an identical product in a market where the demand is described by p = 1; 200 - 2Y. The corresponding cost functions are c1 (y1) = y 2 1 and c2 (y2) =

Basic statistics, Since you have answered the same below question on 2012, ...

Since you have answered the same below question on 2012, can you provide it to me as free of charge this time? if yes, please send it to me on: Question" Case 1: Decision Analysis

Help with homework, 1. Penny Pincher, Inc. had a contribution margin of $33...

1. Penny Pincher, Inc. had a contribution margin of $33,000 on sales of $50,000 and had fixed costs of $18,000. Calculate its break-even point in sales dollars. 2. Krueger Company

Regression Analysis, I have a regression analysis assignment using minicab,...

I have a regression analysis assignment using minicab, but I am not sue how to do with my current data set?

F2 test distributed populations, What is F2 Test, These tests were based o...

What is F2 Test, These tests were based on the assumption that the samples were drawn from normally distributed populations, or more accurately that the sample means were normally

Method of analysis used by the firm, 1. (i) Complaints were made about the ...

1. (i) Complaints were made about the level of pollutants in the discharge from a certain factory.  The factory refuted the complaints by showing the results of their own analysis

Example of selection a sample, Q. Example of Selection a Sample? Ans. ...

Q. Example of Selection a Sample? Ans. Suppose a presidential election is approaching and many people are interested in knowing which candidate is most likely to win the v

Hypothesis and spss, The purpose of this activity is to help you learn how ...

The purpose of this activity is to help you learn how to enter data into SPSS by yourself.  You will use SPSS via Acadlabs.  You will discuss this activity in your group and will t

State unemployment tax, State unemployment tax Condition government aut...

State unemployment tax Condition government authorities provide lack of employment solutions and figure out conditions lack of employment tax amount for each company. (Some not

HYPOTHESIS TESTING, The fluctuations in the stock market induce some invest...

The fluctuations in the stock market induce some investors to sell and move their money into more stable investments. To determine the degree to which recent fluctuation affected o

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