Probability and Statistics for Engineering and the Sciences
9th Edition
ISBN: 9781305251809
Author: Jay L. Devore
Publisher: Cengage Learning
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Textbook Question
Chapter 14.3, Problem 26E
Contamination of various food products is an ongoing problem all over the world. The article “Prevalence and Quantitative Detection of Salmonella in Retail Raw Chicken in Shaanxi, China” (J. of Food Production, 2013) reported the following data on the occurrence of salmonella in chicken of three different types: (1) supermarket chilled, (2) supermarket frozen, and (3) wet market fresh slaughtered.
| # Salmonella Positive Samples | |||
| Type | 1. | 60 | 27 |
| 2. | 60 | 32 | |
| 3. | 120 | 45 |
Does it appear that the incidence rate of salmonella occurrence depends on the type of chicken? State and test the appropriate hypotheses using a significance level of .05.
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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
Chapter 14 Solutions
Probability and Statistics for Engineering and the Sciences
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