Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Table 2: Mathematics Score/Jadual 2: Skor Matematik 27 37 30 28 39 25 45 28 32 28 26 38 31 30 47 41 a) Based on Table 2, organize the data into a frequency distribution by taking
"A company of accountants has branches in five regions, Port Louis (PL), Curepipe (CPE), Beau Bassin (BB), Rose Hill (RH) and Quatre Bornes (QB). It employs the following number
A teacher is interested in comparing the effects of 3 different parts of rehearsal methods (Rote rehearsal, Imagery, and Story) on number of words recalled. Participants are random
The following are actual data showing the latitude of a sample of major cities in the northern hemisphere and their mean high annual temperature. latitude(X)
describe uses of energy
The whole point of organizing data using SPSS software is so that we can manipulate the data to answer our descriptive and inferential questions. This next section will walk you t
From random sample of 48 days in a recent year, U.S. gasoline prices had a mean of $3.63. Assume the population standard deviation is $0.21?
A company wishes to issue new preference shares; the company will incur flotation cost of 2% per share. the market value of this shares is $90 per share & a nominal value of $100 p
Rocco works for an international arms dealer who has just publicly listed. What with the world being how it is these days, there's money to be made on more than just selling the to
Reproduction rates: if the majority of births are those of boys the population is bound to decrease while the reverse will be the case if the majority of births are girls. Similar
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd