The heights of a simple random sample of 400 male high school sophomores in a Midwestern state are measured. The sample mean is x = 66.2 inches. Suppose that the heights of male high school sophomores follow a Normal distribution with a standard deviation of o=4.1 inches. Suppose the heights of a simple random sample of 100 male sophomores were measured rather than 400. Which of the following statements is true? A) The margin of error for the 95% confidence interval would increase. B) The margin of error for the 95% confidence interval would decrease. C) The margin of error for the 95% confidence interval would stay the same because the level of confidence has not changed. D) The standard deviation o would decrease.
The heights of a simple random sample of 400 male high school sophomores in a Midwestern state are measured. The sample mean is x = 66.2 inches. Suppose that the heights of male high school sophomores follow a Normal distribution with a standard deviation of o=4.1 inches. Suppose the heights of a simple random sample of 100 male sophomores were measured rather than 400. Which of the following statements is true? A) The margin of error for the 95% confidence interval would increase. B) The margin of error for the 95% confidence interval would decrease. C) The margin of error for the 95% confidence interval would stay the same because the level of confidence has not changed. D) The standard deviation o would decrease.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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![The heights of a simple random sample of 400 male high school sophomores in a
Midwestern state are measured. The sample mean is x = 66.2 inches. Suppose that the
heights of male high school sophomores follow a Normal distribution with a standard
deviation of o= 4.1 inches. Suppose the heights of a simple random sample of 100
male sophomores were measured rather than 400. Which of the following statements is
true?
A) The margin of error for the 95% confidence interval would increase.
B) The margin of error for the 95% confidence interval would decrease.
C) The margin of error for the 95% confidence interval would stay the same because
the level of confidence has not changed.
D) The standard deviation owould decrease.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7db78f16-9dd2-4e42-82c0-d6a943692490%2Fcbf326bf-23e5-4f7a-9e30-ac836b060efc%2Fnswzud8_processed.png&w=3840&q=75)
Transcribed Image Text:The heights of a simple random sample of 400 male high school sophomores in a
Midwestern state are measured. The sample mean is x = 66.2 inches. Suppose that the
heights of male high school sophomores follow a Normal distribution with a standard
deviation of o= 4.1 inches. Suppose the heights of a simple random sample of 100
male sophomores were measured rather than 400. Which of the following statements is
true?
A) The margin of error for the 95% confidence interval would increase.
B) The margin of error for the 95% confidence interval would decrease.
C) The margin of error for the 95% confidence interval would stay the same because
the level of confidence has not changed.
D) The standard deviation owould decrease.
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