Statistics for Business & Economics
12th Edition
ISBN: 9781285528830
Author: David R. Anderson
Publisher: Cengage Learning US
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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
Statistics for Business & Economics
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Ch. 12.2 - A Bloomberg Businessweek subscriber study asked,...Ch. 12.2 - A Deloitte employment survey asked a sample of...Ch. 12.2 - health insurance benefits vary by the size of the...Ch. 12.2 - A vehicle quality survey asked new owners a...Ch. 12.2 - The Wall Street Journal Corporate Perceptions...Ch. 12.2 - As the price of oil rises, there is increased...Ch. 12.2 - The national Sleep Foundation used a survey to...Ch. 12.2 - Prob. 18ECh. 12.3 - Test the following hypotheses by using the 2...Ch. 12.3 - The following data are believed to have come from...Ch. 12.3 - During the first 13 weeks of the television...Ch. 12.3 - Mars, Inc. manufactures MMs, one of the most...Ch. 12.3 - The wall street Journals Shareholder Scoreboard...Ch. 12.3 - The national highway Traffic Safety administration...Ch. 12.3 - use = .01 and conduct a goodness of fit test to...Ch. 12.3 - The weekly demand for a product is believed to be...Ch. 12 - In a quality control test of parts manufactured at...Ch. 12 - Phoenix Marketing international identified...Ch. 12 - Samples taken in three cities, Anchorage, Atlanta,...Ch. 12 - A Pew Research Center survey asked respondents if...Ch. 12 - Bara Research Group conducted a survey about...Ch. 12 - An ambulance service responds to emergency calls...Ch. 12 - Based on sales over a six-month period, the five...Ch. 12 - A random sample of final examination grades for a...Ch. 12 - A salesperson makes four calls per day. A sample...Ch. 12 - In a study conducted by Zogby International for...
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