An Introduction to Statistical Methods and Data Analysis
7th Edition
ISBN: 9781305269477
Author: R. Lyman Ott, Micheal T. Longnecker
Publisher: Cengage Learning
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Chapter 3.11, Problem 70SE
a.
To determine
Construct a
b.
To determine
Find the
c.
To determine
Explain why there may be a correlation between these two diseases.
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20 km, because
GISS
Worksheet 10
Jesse runs a small business selling and delivering mealie meal to the spaza shops.
He charges a fixed rate of R80, 00 for delivery and then R15, 50 for each packet of
mealle meal he delivers. The table below helps him to calculate what to charge
his customers.
10
20
30
40
50
Packets of mealie
meal (m)
Total costs in Rands
80
235
390
545
700
855
(c)
10.1.
Define the following terms:
10.1.1. Independent Variables
10.1.2. Dependent Variables
10.2.
10.3.
10.4.
10.5.
Determine the independent and dependent variables.
Are the variables in this scenario discrete or continuous values? Explain
What shape do you expect the graph to be? Why?
Draw a graph on the graph provided to represent the information in the
table above.
TOTAL COST OF PACKETS OF MEALIE MEAL
900
800
700
600
COST (R)
500
400
300
200
100
0
10
20
30
40
60
NUMBER OF PACKETS OF MEALIE MEAL
Let X be a random variable with support SX = {−3, 0.5, 3, −2.5, 3.5}. Part ofits probability mass function (PMF) is given bypX(−3) = 0.15, pX(−2.5) = 0.3, pX(3) = 0.2, pX(3.5) = 0.15.(a) Find pX(0.5).(b) Find the cumulative distribution function (CDF), FX(x), of X.1(c) Sketch the graph of FX(x).
Chapter 3 Solutions
An Introduction to Statistical Methods and Data Analysis
Ch. 3.11 - The U.S. government spent more than $3.6 trillion...Ch. 3.11 - The type of vehicle the U.S public purchases...Ch. 3.11 - It has been reported that there has been a change...Ch. 3.11 - The regulations of the board of health in a...Ch. 3.11 - The National Highway Traffic Safety Administration...Ch. 3.11 - Prob. 6ECh. 3.11 - The survival times (in months) for two treatments...Ch. 3.11 - Combine the data from the separate therapies in...Ch. 3.11 - Prob. 9ECh. 3.11 - The following table presents homeownership rates,...
Ch. 3.11 - Prob. 11ECh. 3.11 - Prob. 12ECh. 3.11 - A supplier of high-quality audio equipment for...Ch. 3.11 - Prob. 14ECh. 3.11 - Compute the mean, median, and mode for the...Ch. 3.11 - Prob. 16ECh. 3.11 - Prob. 17ECh. 3.11 - Prob. 18ECh. 3.11 - A study of the reliability of buses [Large Sample...Ch. 3.11 - Prob. 20ECh. 3.11 - Prob. 21ECh. 3.11 - A study of the survival times, in days, of skin...Ch. 3.11 - Prob. 23ECh. 3.11 - Prob. 24ECh. 3.11 -
Refer to Exercise 3.24. Average the three group...Ch. 3.11 -
Pushing economy and wheelchair-propulsion...Ch. 3.11 - Prob. 27ECh. 3.11 - Prob. 28ECh. 3.11 -
The treatment times (in minutes) for patients at...Ch. 3.11 - To assist in estimating the amount of lumber in a...Ch. 3.11 -
Consumer Reports in its June 1998 issue reports...Ch. 3.11 - Many marine phanerogam species are highly...Ch. 3.11 - Prob. 33ECh. 3.11 - The following data are the resting pulse rates for...Ch. 3.11 - Consumer Reports in its May 1998 issue provides...Ch. 3.11 - Prob. 36ECh. 3.11 - Prob. 37ECh. 3.11 - Prob. 38ECh. 3.11 - In the paper “Demographic Implications of...Ch. 3.11 - Prob. 40ECh. 3.11 - Prob. 41ECh. 3.11 - Prob. 42ECh. 3.11 - Prob. 43SECh. 3.11 - Prob. 44SECh. 3.11 - Prob. 45SECh. 3.11 - Prob. 46SECh. 3.11 - Prob. 47SECh. 3.11 - Prob. 48SECh. 3.11 - A random sample of 90 standard metropolitan...Ch. 3.11 - Prob. 50SECh. 3.11 - Prob. 51SECh. 3.11 - Prob. 52SECh. 3.11 - Prob. 53SECh. 3.11 - The Insurance Institute for Highway Safety...Ch. 3.11 - Prob. 55SECh. 3.11 - Prob. 56SECh. 3.11 -
Federal authorities have destroyed considerable...Ch. 3.11 - The most widely reported index of the performance...Ch. 3.11 - As one part of a review of middle-manager...Ch. 3.11 - Prob. 60SECh. 3.11 - Prob. 61SECh. 3.11 - Prob. 62SECh. 3.11 - The correlations computed for the six variables in...Ch. 3.11 - Prob. 64SECh. 3.11 - Prob. 65SECh. 3.11 - Prob. 66SECh. 3.11 - Prob. 67SECh. 3.11 - Prob. 68SECh. 3.11 - Prob. 69SECh. 3.11 - Prob. 70SECh. 3.11 - Prob. 71SECh. 3.11 -
Refer to the data in Exercise 3.69.
Construct a...Ch. 3.11 - Prob. 73SECh. 3.11 - Prob. 74SECh. 3.11 - Prob. 75SECh. 3.11 - Prob. 76SECh. 3.11 - Prob. 77SECh. 3.11 - Prob. 78SECh. 3.11 - Prob. 79SECh. 3.11 - Prob. 80SE
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- A well-known company predominantly makes flat pack furniture for students. Variability with the automated machinery means the wood components are cut with a standard deviation in length of 0.45 mm. After they are cut the components are measured. If their length is more than 1.2 mm from the required length, the components are rejected. a) Calculate the percentage of components that get rejected. b) In a manufacturing run of 1000 units, how many are expected to be rejected? c) The company wishes to install more accurate equipment in order to reduce the rejection rate by one-half, using the same ±1.2mm rejection criterion. Calculate the maximum acceptable standard deviation of the new process.arrow_forward5. Let X and Y be independent random variables and let the superscripts denote symmetrization (recall Sect. 3.6). Show that (X + Y) X+ys.arrow_forward8. Suppose that the moments of the random variable X are constant, that is, suppose that EX" =c for all n ≥ 1, for some constant c. Find the distribution of X.arrow_forward
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