MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Confidence Intervals
When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calcul…
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part d please 

A newspaper reported that 50% of people say that some coffee shops are overpriced. The source of this information was a telephone survey of 100 adults. a. Identify the population of interest in this study. b. Identify the sample for the study. c. Identify the parameter of interest in the study. d. Find and interpret a 95% confidence interval for the parameter of interest. newspapers 100 adults coffee shops a telephone survey 50% of adults adults c. Identify the parameter of interest. Choose the correct answer below A. x, the sample mean number of adults who say that some coffee shops are overpriced B. p, the population proportion of adults who say that some coffee shops are overpriced С. р, the sample proportion of adults who say that some coffee shops are overpriced D. o, the population variance of adults who say that some coffee shops are overpriced d. The 95% confidence interval for the parameter of interest is (Round to two decimal places as needed.) Interpret this confidence interval. Choose the correct answer below. A. There is a 95% chance that the value of the parameter of interest is outside the interval. B. We are 95% confident that the parameter of interest lies in the confidence interval. C. We are confident that 95% of the population is described by the interval for the parameter of interest. O D. We are confident that 95% of the population is outside the interval for the parameter of interest.
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Transcribed Image Text:A newspaper reported that 50% of people say that some coffee shops are overpriced. The source of this information was a telephone survey of 100 adults. a. Identify the population of interest in this study. b. Identify the sample for the study. c. Identify the parameter of interest in the study. d. Find and interpret a 95% confidence interval for the parameter of interest. newspapers 100 adults coffee shops a telephone survey 50% of adults adults c. Identify the parameter of interest. Choose the correct answer below A. x, the sample mean number of adults who say that some coffee shops are overpriced B. p, the population proportion of adults who say that some coffee shops are overpriced С. р, the sample proportion of adults who say that some coffee shops are overpriced D. o, the population variance of adults who say that some coffee shops are overpriced d. The 95% confidence interval for the parameter of interest is (Round to two decimal places as needed.) Interpret this confidence interval. Choose the correct answer below. A. There is a 95% chance that the value of the parameter of interest is outside the interval. B. We are 95% confident that the parameter of interest lies in the confidence interval. C. We are confident that 95% of the population is described by the interval for the parameter of interest. O D. We are confident that 95% of the population is outside the interval for the parameter of interest.
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