Before 1918, approximately 60% of the wolves in the New Mexico and Arizona region were male, and 40% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 65% of wolves in the region are male, and 35% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.)
(a) Before 1918, in a random sample of 9 wolves spotted in the
region, what is the probability that 6 or more were male?
b) What is the probability that 6 or more were female?
c) What is the probability that fewer than 3 were female?
d) For the period from 1918 to the present, in a random sample of 9
wolves spotted in the region, what is the probability that 6 or
more were male?
e) What is the probability that 6 or more were female?
f) What is the probability that fewer than 3 were female?
(a)
Let X and Y be the random variable denoting the number of male and
female wolves respectively in a sample.
Before 1918:
P(X) = 0.60
P(Y) = 0.40
P(X=6) = 0.2508
P(X=7) = 0.1612
P(X=8) = 0.0605
P(X=9) = 0.0101
(b)
P(Y=6) = 0.0743
P(Y=7) = 0.0212
P(Y=8) = 0.0035
P(Y=9) = 0.0003
(c)
P(Y=0) = 0.0101
P(Y=1) = 0.0605
P(Y=2) = 0.1612
P(Y < 3) = 0.2318
(d)
After 1918:
P(X) = 0.65
P(Y) = 0.35
P(X=6) = 0.2716
P(X=7) = 0.2162
P(X=8) = 0.1004
P(X=9) = 0.0207
(e)
P(Y=6) = 0.0424
P(Y=7) = 0.0098
P(Y=8) = 0.0013
P(Y=9) = 0.0000
(f)
P(Y=0) = 0.0207
P(Y=1) = 0.1004
P(Y=2) = 0.2162
P(Y < 3) = 0.3373
Before 1918, approximately 60% of the wolves in the New Mexico and Arizona region were male,...
Before 1918, approximately 55% of the wolves in the New Mexico and Arizona region were male, and 45% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 65% of wolves in the region are male, and 35% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal...
Before 1918, approximately 55% of the wolves in a region were male, and 45% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present approximately 65% of wolves in the region are male, and 35 % are female.. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.) (a) Before...
Before 1918, approximately 55% of the wolves in a region were male, and 45% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 70% of wolves in the region are male, and 30% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.) (a) Before 1918,...
before 1918, approximately 60 % of thenwolves in a region were
male, and 40 % were female. however , cattle ranchers in this area
have made a determined effort to exterminate wolves. from 1918 to
the present , approximately 65 % of wolves in the region are male
and 35 % are female. Biologist suspect that male wolves are more
likely than females to return to an area where the population has
been greatly reduced. ( round your answer to...
Before 1918, approximately 60% of the wolves in a region were male, and 40%were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present approximately 65% of wolves in the region are male, and 35 % are female.. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.)
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...
According to a magazine, as of January 2018, 6% of chief executive officers were women. Complete parts A through D based on a random sample of 12 CEO's. a. What is the probability that one corporate officer was female? b. What is the probability that fewer than four corporate officers were female? c. What is the probability that more than two corporate officers were female? d. What are the mean and standard deviation for this distribution?
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1. According to a magazine, as of January 2018, 12% of chief executive officers were women. Complete parts A through D based on a random sample of 12 CEO's. a. What is the probability that one corporate officer was female? b. What is the probability that fewer than four corporate officers were female? c. What is the probability that more than two corporate officers were female? d. What are the mean and standard deviation for this distribution 2. According to...
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