A random sample of 23 adult male wolves from the Canadian Northwest Territories gave an average weight x1 = 98.6 pounds with estimated sample standard deviation s, = 7.3 pounds. Another sample of 23 adult male wolves from Alaska gave an average weight x2 = 88.2 pounds with estimated sample standard deviation s2 = 6.4 pounds. (a) Categorize the problem below according to parameter being estimated, proportion p, mean µ, difference of means u1 - H2, or difference of proportions p1 - P2. Then solve the problem. O P1 - P2 O p (b) Let µ1 represent the population mean weight of adult male wolves from the Northwest Territories, and let µ2 represent the population mean weight of adult male wolves from Alaska. Find a 90% confidence interval for 41 - H2. (Use 1 decimal place.) lower limit upper limit (c) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 90% level of confidence, does it appear that the average weight of adult male wolves from the Northwest Territories is greater than that of the Alaska wolves? Because the interval contains only positive numbers, we can say that Canadian wolves weigh more than Alaskan wolves. Because the interval contains both positive and negative numbers, we can not say that Canadian wolves weigh more than Alaskan wolves. We can not make any conclusions using this confidence interval. Because the interval contains only negative numbers, we can say that Alaskan wolves weigh more than Canadian wolves.
A random sample of 23 adult male wolves from the Canadian Northwest Territories gave an average weight x1 = 98.6 pounds with estimated sample standard deviation s, = 7.3 pounds. Another sample of 23 adult male wolves from Alaska gave an average weight x2 = 88.2 pounds with estimated sample standard deviation s2 = 6.4 pounds. (a) Categorize the problem below according to parameter being estimated, proportion p, mean µ, difference of means u1 - H2, or difference of proportions p1 - P2. Then solve the problem. O P1 - P2 O p (b) Let µ1 represent the population mean weight of adult male wolves from the Northwest Territories, and let µ2 represent the population mean weight of adult male wolves from Alaska. Find a 90% confidence interval for 41 - H2. (Use 1 decimal place.) lower limit upper limit (c) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 90% level of confidence, does it appear that the average weight of adult male wolves from the Northwest Territories is greater than that of the Alaska wolves? Because the interval contains only positive numbers, we can say that Canadian wolves weigh more than Alaskan wolves. Because the interval contains both positive and negative numbers, we can not say that Canadian wolves weigh more than Alaskan wolves. We can not make any conclusions using this confidence interval. Because the interval contains only negative numbers, we can say that Alaskan wolves weigh more than Canadian wolves.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A random sample of 23 adult male wolves from the Canadian Northwest Territories gave an average weight x1 = 98.6 pounds
with estimated sample standard deviation s, = 7.3 pounds. Another sample of 23 adult male wolves from Alaska gave an
average weight x, = 88.2 pounds with estimated sample standard deviation s2 = 6.4 pounds.
(a) Categorize the problem below according to parameter being estimated, proportion p, mean u, difference of
means µ1 - 42, or difference of proportions p1 - P2. Then solve the problem.
O P1 - P2
O H1 - 42
(b) Let µz represent the population mean weight of adult male wolves from the Northwest Territories, and let u2
represent the population mean weight of adult male wolves from Alaska. Find a 90% confidence interval for u1 - H2.
(Use 1 decimal place.)
lower limit
upper limit
(c) Examine the confidence interval and explain what it means in the context of this problem. Does the interval
consist of numbers that are all positive? all negative? of different signs? At the 90% level of confidence, does it
appear that the average weight of adult male wolves from the Northwest Territories is greater than that of the Alaska
wolves?
Because the interval contains only positive numbers, we can say that Canadian wolves weigh more than
Alaskan wolves.
Because the interval contains both positive and negative numbers, we can not say that Canadian wolves weigh
more than Alaskan wolves.
We can not make any conclusions using this confidence interval.
Because the interval contains only negative numbers, we can say that Alaskan wolves weigh more than
Canadian wolves.
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