|The distribution of weights is a large group is approximately normally distributed. The mean is 80 kg. and approximately 68% of the weights are between 70 and 90 kg. What is the standard deviation of the distribution of weights? а. 20 b. 5 c. 10 d. 15 A recent news program reported that the presidential approval rate was 51% with a margin of error of ± 4%. What is meant by + 4%? a. The proportion of Americans who approve the president is between 47% and 55%. b. Unless the true proportion of Americans who approve of the president is between 47% and 55%, it is unlikely we could have obtained from these sample results. c. The president's approval rating from those sampled was between 47% and 55%. d. 4% of the respondents were undecided. Which one of the following statements about a confidence interval is TRUE? a. The width of confidence interval is increased when the sample size is increased. b. Changes in the required level of confidence, 1-alpha, do not affect the width of the confidence interval. c. The wider the confidence interval, the least precise the estimate of the population parameter d. The width of confidence interval is increased when the sample size is decreased.

|The distribution of weights is a large group is approximately normally distributed. The mean is 80 kg. and approximately 68% of the weights are between 70 and 90 kg. What is the standard deviation of the distribution of weights? а. 20 b. 5 c. 10 d. 15 A recent news program reported that the presidential approval rate was 51% with a margin of error of ± 4%. What is meant by + 4%? a. The proportion of Americans who approve the president is between 47% and 55%. b. Unless the true proportion of Americans who approve of the president is between 47% and 55%, it is unlikely we could have obtained from these sample results. c. The president's approval rating from those sampled was between 47% and 55%. d. 4% of the respondents were undecided. Which one of the following statements about a confidence interval is TRUE? a. The width of confidence interval is increased when the sample size is increased. b. Changes in the required level of confidence, 1-alpha, do not affect the width of the confidence interval. c. The wider the confidence interval, the least precise the estimate of the population parameter d. The width of confidence interval is increased when the sample size is decreased.

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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Instruction: Please help me to answer all the questions correctly.
The distribution of weights is a large group is approximately normally distributed. The mean is 80 kg.
and approximately 68% of the weights are between 70 and 90 kg. What is the standard deviation of
the distribution of weights?
а. 20
b. 5
c. 10
d. 15
A recent news program reported that the presidential approval rate was 51% with a margin of error
of t 4%. What is meant by + 4%?
a. The proportion of Americans who approve the president is between 47% and 55%.
b. Unless the true proportion of Americans who approve of the president is between 47% and 55%,
it is unlikely we could have obtained from these sample results.
c. The president's approval rating from those sampled was between 47% and 55%.
d. 4% of the respondents were undecided.
Which one of the following statements about a confidence interval is TRUE?
a. The width of confidence interval is increased when the sample size is increased.
b. Changes in the required level of confidence, 1-alpha, do not affect the width of the confidence
interval.
c. The wider the confidence interval, the least precise the estimate of the population parameter
d. The width of confidence interval is increased when the sample size is decreased.

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