OPENINTRO:STATISTICS
4th Edition
ISBN: 9781943450077
Author: OPENINTRO
Publisher: amazon.com
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Chapter 1, Problem 37E
a.
To determine
Identify the type of study.
b.
To determine
Identify the experimental treatment and control treatments in the given study.
c.
To determine
Identify whether the study use blocking and specify the blocking variable.
d.
To determine
Identify whether the study uses blinding.
e.
To determine
Identify and explain whether the study can be used to establish a causal relationship.
Explain whether the conclusions can be generalized to the population.
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State the hypotheses
Critical value and df
Test statistic
The following is based on information from The Wolf in the Southwest: The Making of an Endangered Species, by David E. Brown
(University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves
was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to destroy wolves. In a recent
sample of 37 wolves, there were only 11 females. One theory is that male wolves tend to return sooner than females to their old
territories, where their predecessors were exterminated. Do these data indicate that the population proportion of female wolves is
now less than 50% in the region? Use α = 0.01.
(a) What is the level of significance?
State the null and alternate hypotheses.
O Ho: P 0.5
O Ho: P = 0.5; H₁: p 5 and nq > 5.
O The Student's t, since np > 5 and ng > 5.
The standard normal, since np < 5 and nq < 5.
O The Student's t, since np < 5 and nq < 5.
What is the value of the sample test statistic? (Round…
The following is based on information from The Wolf in the Southwest: The Making of an Endangered Species, by David E. Brown (University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to destroy wolves. In a recent sample of 37 wolves, there were only 11 females.
One theory is that male wolves tend to return sooner than females to their old territories, where their predecessors were exterminated. Do these data indicate that the population proportion of female wolves is
now less than 50% in the region? Use a = 0.01.
Chapter 1 Solutions
OPENINTRO:STATISTICS
Ch. 1.1 - Prob. 1GPCh. 1.1 - Prob. 1ECh. 1.1 - Prob. 2ECh. 1.2 - Prob. 2GPCh. 1.2 - Prob. 3GPCh. 1.2 - Prob. 4GPCh. 1.2 - Prob. 6GPCh. 1.2 - Prob. 7GPCh. 1.2 - Prob. 3ECh. 1.2 - Prob. 4E
Ch. 1.2 - Prob. 5ECh. 1.2 - Prob. 6ECh. 1.2 - Prob. 7ECh. 1.2 - Prob. 8ECh. 1.2 - Prob. 9ECh. 1.2 - Prob. 10ECh. 1.2 - Prob. 11ECh. 1.2 - Prob. 12ECh. 1.3 - Prob. 9GPCh. 1.3 - Prob. 11GPCh. 1.3 - Prob. 12GPCh. 1.3 - Prob. 13GPCh. 1.3 - Prob. 13ECh. 1.3 - Prob. 14ECh. 1.3 - Prob. 15ECh. 1.3 - Prob. 16ECh. 1.3 - Prob. 17ECh. 1.3 - Prob. 18ECh. 1.3 - Prob. 19ECh. 1.3 - Prob. 20ECh. 1.3 - Prob. 21ECh. 1.3 - Prob. 22ECh. 1.3 - Prob. 23ECh. 1.3 - Prob. 24ECh. 1.3 - Prob. 25ECh. 1.3 - Prob. 26ECh. 1.3 - Prob. 27ECh. 1.3 - Prob. 28ECh. 1.4 - Prob. 16GPCh. 1.4 - Prob. 17GPCh. 1.4 - Prob. 29ECh. 1.4 - Prob. 30ECh. 1.4 - Prob. 31ECh. 1.4 - Prob. 32ECh. 1.4 - Prob. 33ECh. 1.4 - Prob. 34ECh. 1 - Prob. 35ECh. 1 - Prob. 36ECh. 1 - Prob. 37ECh. 1 - Prob. 38ECh. 1 - Prob. 39CECh. 1 - Prob. 40CECh. 1 - Prob. 41CECh. 1 - Prob. 42CECh. 1 - Prob. 43CECh. 1 - Prob. 44CE
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- List the sample space of each experiment. Tossing three coinsarrow_forwardThe following is based on information from The Wolf in the Southwest: The Making of an Endangered Species, by David E. Brown (University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to destroy wolves. In a recent sample of 37 wolves, there were only 11 females. One theory is that male wolves tend to return sooner than females to their old territories, where their predecessors were exterminated. Do these data indicate that the population proportion of female wolves is now less than 50% in the region? Use a = 0.01. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: p 0.5 (b) What sampling distribution will you use? O The Student's t, since np 5 and nq > 5. O The Student's t, since np > 5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.)…arrow_forwardExperiment 3: Does sleep deprivation affect sustained attention? A sleep researcher conducts an experiment to determine whether sleep loss affects the ability to maintain sustained attention. Fifteen individuals are randomly divided into the following three groups of five participants each: group 1, which gets the normal amount of sleep (7–8 hours); group 2, which is sleep-deprived for 24 hours; and group 3, which is sleep-deprived for 48 hours. All three groups are tested on the same auditory vigilance task. Participants are presented with half-second tones spaced at irregular intervals over a 1-hour duration. Occasionally, one of the tones is slightly shorter than the rest. The participant’s task is to detect the shorter tones. The following percentages of correct detections of the short tone were observed: The response needs to have the following information thanks! Hypotheses: both alternative and the null Mean and standard deviation of each group . Clear indication of the…arrow_forward
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