Bundle: Statistics for Business & Economics, Loose-leaf Version, 13th + MindTap Business Statistics with XLSTAT, 2 terms (12 months) Printed Access Card
13th Edition
ISBN: 9781337127264
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: Cengage Learning
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Chapter 12.1, Problem 5E
Kate Sanders, a researcher in the department of biology at IPFW university, studied the effect of agriculture contaminants on the stream fish population in Northeastern Indiana (April 2012). Specially designed traps collected samples of fish at each of four stream locations. a research question was, Did the differences in agricultural contaminants found at the four locations alter the proportion of the fish population by gender? Observed frequencies were as follows.
Stream Location
| Gender | A | B | C | D |
| Male | 49 | 44 | 49 | 39 |
| Female | 41 | 46 | 36 | 44 |
- a. focusing on the proportion of male fish at each location, test the hypothesis that the population proportions are equal for all four locations. use a .05 level of significance. What is the p-value and what is your conclusion?
- b. Does it appear that differences in agricultural contaminants found at the four locations altered the fish population by gender?
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A researcher in a university's biology department studied the effect of agriculture contaminants on the stream fish population in northeastern Indiana. Specially-
designed traps collected samples of fish at each of four stream locations. A research question was "Did the differences in agricultural contaminants found at the
four locations alter the proportion of the fish population by gender?" Suppose observed frequencies were as follows.
Stream Locations
ABCD
Gender
53 48 53 43
Female 37 42 32 40
(a) Focusing on the proportion of male fish at each location, test the hypothesis that the population proportions are equal for all four locations. Use a 0.05 level
of significance.
Male
State the null and alternative hypotheses.
O Ho: All population proportions are not equal.
H: PAPPc Po
OHO PA PB Pc Po
H: Not all population proportions are equal.
O Ho: Not all population proportions are equal.
HPA Pe Pc Po
OH PA
Pc Po
H: All population proportions are not equal.
A researcher in a university's biology department studied the effect of agriculture contaminants on the stream fish population in northeastern Indiana. Specially-designed traps collected samples of fish at each of four stream locations. A research question was "Did the
differences in agricultural contaminants found at the four locations alter the proportion of the fish population by gender?" Suppose observed frequencies were as follows.
Stream Locations
Gender
A
B
D
Male
51
46
51
41
Female
39
44
34
42
(a) Focusing on the proportion of male fish at each location, test the hypothesis that the population proportions are equal for all four locations. Use a 0.05 level of significance.
State the null and alternative hypotheses.
O Ho: PA = PB = Pc = PD
H: Not all population proportions are equal.
O Ho: PA = PB = Pc = PD
H: All population proportions are not equal.
O Hn: All population proportions are not equal.
Ha: PA = PB = Pc = PD
O Ho: Not all population proportions are equal.
Hai PA = PB…
A healthcare provider notices an outbreak of foodborne illness among individuals who attended a holiday cookout. Which study type would be most beneficial in identifying the source of the outbreak?
Chapter 12 Solutions
Bundle: Statistics for Business & Economics, Loose-leaf Version, 13th + MindTap Business Statistics with XLSTAT, 2 terms (12 months) Printed Access Card
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