ANSWER PART A B C D PART C (c)Observe that for the 18/ twenty = 90% of the samples, the confidence interval of 95% contains the population proportion. Choose the correct statement. _ When calculating confidence intervals of 95% for twenty samples of the same population size, the percentage of the samples containing the population proportion should be close to the 95% ,but it may not be exactly the 95%. _ When calculating confidence intervals of 95% for twenty samples of the same size of the population, at most 95% of the samples will contain the population proportion. _ When calculating confidence intervals of 95% for twenty samples of the same size from the population, exactly the 95% of the samples must contain the population proportion. There must have been an error with the way we've chosen the samples. PART D Choose ALL the options that are true. _ If there were a Sample 21 of size = n o 160 with the same sample proportion as Sample 15, then the confidence interval of 80% for Sample 21 would be wider than the confidence interval of 80% for Sample 15. _ The confidence interval of 80% for Sample 15 is narrower than the confidence interval of 95% for Sample 15. This must be so since when calculating a confidence interval for a sample, the higher the confidence level, the wider the confidence interval. _ Although the 80% (a confidence level) is not equal to 0.67 (the population proportion), it could be that a confidence interval of 80% contains the proportion of the population 0.67 _ From the confidence interval of 95% for Sample 15, we know that there is a probability of 95% that the proportion of the population is between 0.47 and 0.84. _ None of the above options is true.

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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Question

ANSWER PART A B C D

PART C

(c)Observe that for the 18/ twenty = 90% of the samples, the confidence interval of 95%
contains the population proportion. Choose the correct statement.

___ When calculating confidence intervals of 95% for twenty samples of the same population size, the percentage of the samples containing the population proportion should be close to the 95% ,but it may not be exactly the

95%.

___ When calculating confidence intervals of 95% for twenty samples of the same size of the population, at most

95% of the samples will contain the population proportion.

___ When calculating confidence intervals of 95% for twenty samples of the same size from the population, exactly the 95% of the samples must contain the population proportion. There must have been an error with the way we've chosen the samples.

PART D

Choose ALL the options that are true.

___ If there were a Sample 21 of size = n o 160 with the same sample proportion as Sample 15, then the confidence interval of 80% for Sample 21 would be wider than the confidence interval of 80% for Sample 15.

___ The confidence interval of 80% for Sample 15 is narrower than the confidence interval of

95% for Sample 15. This must be so since when calculating a confidence interval for a sample, the higher the confidence level, the wider the confidence interval.

___ Although the 80% (a confidence level) is not equal to 0.67 (the population proportion), it could be that a confidence interval of 80% contains the proportion of the population 0.67

___ From the confidence interval of 95% for Sample 15, we know that there is a probability of 95% that the proportion of the population is between 0.47 and 0.84.

___ None of the above options is true.