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

Using a venn diagram evaluate the probability, Question: (a) 100 indiv...

Question: (a) 100 individuals applied for systems analyst positions with a large firm during the past year. 40 of them had some prior work experience (W), and 30 had a profes

Determine angle rounded to the nearest degree, Assume that the pulleys are ...

Assume that the pulleys are small frictionless pulleys. Three weights are supported as shown and have weights of W A = P5 N, W B = P6 N, and W C = P7 N.  Determine angle θ

Byron, 1. Provide a video or peer reviewed example analyzing the article an...

1. Provide a video or peer reviewed example analyzing the article and point out the Null, Alternative Hypothesis, and explain how z-testing was used.

Discuss single control chart , Question 1 A courier company conducted ...

Question 1 A courier company conducted a brainstorming session amongst drivers to ascertain the reasons why it was unable to deliver items to households, always right first ti

Want to get job, I am Hussain and I have done master in Statistics. Current...

I am Hussain and I have done master in Statistics. Currently I am doing Mphil Statistics from Pakistan. I want to get online Statistics Tutor job. So contact with me as soon as pos

What is Agency financial reporting system (afrs), What is Agency financial ...

What is Agency financial reporting system (afrs) The state-wide sales system managed by the Workplace of Economical Control. AFRS is the condition of Washington''s established sa

Find mode and median, The following data shows marks obtained by 40 student...

The following data shows marks obtained by 40 students in a Statistics test. 75 99 72 54 25 40 65 32 69 10 85 48 52 80  63 64 35 62 51 71 67 57 95 74 56 69 61  49 45 63 39

Explain accounting Accumulated depreciation , A contra-asset assessment con...

A contra-asset assessment consideration used to history the buildup of regular credit created to indicate the conclusion of the approximated useful life of investment resources.

Probability tree., Modern hotels and certain establishments make use of an ...

Modern hotels and certain establishments make use of an electronic door lock system. To open a door an electronic card is inserted into a slot. A green light indicates that the doo

Co-relation, Co-relation: Co-relation in this case studies the behavior how...

Co-relation: Co-relation in this case studies the behavior how each of the investment opportunity would react to any event vis – a vis each other. The same is measured in terms of

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