Our friend the waffleman wishes to estimate the average revenue from ticket sales at Broadway for the past year. Using a random sample of 120 plays from the past year, she computed a 87% confidence interval of [114, 122]. She used a histogram to verify that her data was normally distributed. Which of the following is a correct statement? Select one or more: O a. If our friend the waffleman were to repeatedly take random samples of 120 plays and construct 87% confidence intervals with each sample, approximately 95% of the confidence intervals would contain the true average revenue from ticket sales at Broadway from the past year. O b. With the information given in this problem, we cannot calculate the margin of error. O c. If our friend the waffleman selects a new sample of 140 plays and creates a new 87% confidence interval, the new interval would be wider than the interval calculated on 120 plays. d. We are 87% confident that the average revenue from ticket sales of the sample will be between 114 and 122. e. We are 87% confident that the true average revenue from ticket sales at Broadway from the past year is in the

Our friend the waffleman wishes to estimate the average revenue from ticket sales at Broadway for the past year. Using a random sample of 120 plays from the past year, she computed a 87% confidence interval of [114, 122]. She used a histogram to verify that her data was normally distributed. Which of the following is a correct statement? Select one or more: O a. If our friend the waffleman were to repeatedly take random samples of 120 plays and construct 87% confidence intervals with each sample, approximately 95% of the confidence intervals would contain the true average revenue from ticket sales at Broadway from the past year. O b. With the information given in this problem, we cannot calculate the margin of error. O c. If our friend the waffleman selects a new sample of 140 plays and creates a new 87% confidence interval, the new interval would be wider than the interval calculated on 120 plays. d. We are 87% confident that the average revenue from ticket sales of the sample will be between 114 and 122. e. We are 87% confident that the true average revenue from ticket sales at Broadway from the past year is in the

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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#34).
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
Suppose a 95% confidence interval for the difference in test scores between Class 1 and Class 2 (in that order) is the following: 9 +/− 2. These results were based on independent samples of size 100 from each class. Now suppose you switch the order of Class 1 and Class 2 in your analysis but keep the data labeled correctly in terms of which class they came from. Which of the following statements is false? A) You can't do it this way. You'll get negative numbers for the difference in the means and/or negative numbers for the standard error. B) You are confident that the average for Class 2 is 7 to 11 points lower than for Class 1. C) You are still confident that the classes have significantly different mean scores. D) Your 95% confidence interval will now be entirely negative: from −7 to −11.
q42
The following data represent a random sample of five measurements from a normally distributed population: 7,4,2,5,7 a. Find 90% confidence interval for u. b. Find a 99% confidence interval for u.
each item # 7-8. 7. Researchers study the effect of political commercials and the likelihood of people inspired to vote for former President Trump in the 2024 presidential election. They show a political commercial to a random sample 150 people. The researchers found a 90% confidence interval for the proportion of people who were influenced to vote for former President Trump after viewing the political commercial to be (0.56, 0.72). Which is true based on the given confidence interval? Select the two correct answers. e. a. We are 90% confident that the true proportion of people inspired to vote for former President Trump after viewing a political commercial is between 0.56 and 0.72. b. 90% of all 90% confidence intervals constructed in this way will capture the true proportion of people inspired to vote for former President Trump after viewing a political commercial. c. We're 90% sure that the proportion of people in this research sample inspired to vote for Sve former President Trump…
Mr Alsup asked the studentS in his third-and sixth-period English classes whether they had chosen a topic for thier writing assignment. he recorded the data in a two-way table, as shown below English class Yes No Total Third period 24 6 30 Sixth period 22 3 25 Total 46 9 55 if jannette in in mr alsup sixth-period english class what is the probablity that she has not chosen a topic for her writing assignment? a- 3% b- 5% c- 12% d-14%
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