STAT TECH IN BUSINESS & ECON LL\AC
18th Edition
ISBN: 9781264720545
Author: Lind
Publisher: MCG
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Chapter 7, Problem 33E
a.
To determine
Obtain the
Obtain the probability that an individual in the age group of 15 to 19 years who spends less than 15 minutes per day using the computer for leisure.
b.
To determine
Obtain the probability that an individual in the age group of 75 years and older who spends more than 2 hours.
Obtain the probability that an individual in the age group of 15 to 19 years who spends more than 2 hours.
c.
To determine
Obtain the probability that an individual in the age group of 75 years and older who spends between 30 minutes and 90 minutes using the computer for leisure.
Obtain the probability that an individual in the age group of 15 to 19 years who spends between 30 minutes and 90 minutes using the computer for leisure.
d.
To determine
Obtain the 20th percentile of the age group of 75 years and older.
Obtain the amount of time, more than which, that eighty percent of the individuals of the age group 75 years and older spend using the computer for leisure.
Obtain the 20th percentile of the age group of 15 to 19 years.
Obtain the amount of time, more than which, that eighty percent of the individuals of the age group of 15 to 19 years spend using the computer for leisure.
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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 7 Solutions
STAT TECH IN BUSINESS & ECON LL\AC
Ch. 7 - Microwave ovens only last so long. The life-time...Ch. 7 - Prob. 1ECh. 7 - Prob. 2ECh. 7 - Prob. 3ECh. 7 - Prob. 4ECh. 7 - Prob. 5ECh. 7 - Prob. 6ECh. 7 - Prob. 2SRCh. 7 - The distribution of the annual incomes of a group...Ch. 7 - Explain what is meant by this statement: There is...
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