DEVORESTAT97.2.020.MY NOTESASK YOUR TEATV advertising agencies face increasing challenges in reaching audience members because viewing TV programs via digital streaming is gaining in popularity. A poli reported that 55% of 2349American adults surveyed said they have watched digitally streamed TV programming on some type of device(a) Calculate and interpret a confidence interval at the 99 confidence level for the proportion of all adut Americans who watched streamed programming up to that point in time. (Round yoanswers to three decimal places.) (b) What sample size would be required for the width of a 99% CI to be at most 0.06 irrespective of the value of i? (Round your answer up to the nearest integer.)EnteraumbeYou may need to use the appropriate table in the Appendix of Tables to answer this question.

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Answered: TV advertising agencies face increasing…

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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Describe how a Confidence Interval might be a better piece of information to report from a study than a hypothesis test.
Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone. Part: 0 / 3 Part 1 of 3 (a) A survey by the National Consumers League estimated the nationwide proportion to be 0.38. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.04? A sample of children aged 8-10 living in New York is needed to obtain a 95% confidence interval with a margin of error of 0.04 using the estimate 0.38 for p. Skip Part. Check E 888 R $100 FO MacBook Air X Save For Later C 00 [110] Submit Assignment 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilit
1. The table below gives the temperature T() and length L(mm) of heated rod ifL= aoT + a1 find the best value of ao and a1. T: [ 20 30 40 50 60 70]L:[800.3 800.4 800,6 800.7 800.9 801.0 ] a. Find the value of ao? * 0.015 0.016 0.021 O 0.1 a. Find the value of a1? * O 799.884 O 799.774 O 799.994 799
In a study of speed dating, male subjects were asked to rate the attractiveness of their female dates, and a sample of the results is listed below (1 = not attractive; 10 = extremely attractive). Construct a confidence interval using a 90% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult females?7,7,1,8,6,5,8,8,8,8,5,9 What is the confidence interval for the population mean u? __<u<__ (Round to one decimal place as needed.)
Part 2
A study is conducted by a physical therapist to determine whether there is a difference in the proportion of men and women in the U.S. that participate in regular sustained physical activity. It is found that 22% of menout of 550 and 19.5% of women out of 450 participated in regular sustained physical activity. Construct a 90% confidence interval for the difference in proportions of men and women that participate in regular sustained and state your conclusion.
Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 479 indicated that they were satisfied. Construct a 95% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p = 0.44 versus H,: p 0.44 (Round to two decimal places as needed.) Use technology to find the 95% confidence interval. The lower is The upper bound is (Round to two decimal places as needed.)
Several years ago, 45% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,025 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,025 surveyed, 484 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed.
A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes. Generate a 95% confidence interval for the proportion of patients on the new medication who report paint relief. Generate a 95% confidence interval for the difference in proportions of patients who report pain relief. Pain Relief No Pain Relief New Medication 44 76 Placebo 21 99
Refer to the accompanying stayed outside and construct a 90% confidence interval as many of the mean pulse rate of adult females then do the same for adult males compare the results.
Question: Part B. Construct a 95% confidence interval of the mean pulse rate for adult males. __bpm <u<__bpm Multiple Choice: Compare the results. A. The confidence intervals do not overlap, so it appears that adult females have a significantly higher mean pulse rate than adult males. B. The confidence intervals overlap, so it appears that adult males have a significantly higher mean pulse rate than adult females. C. The confidence intervals do not overlap, so it appears that there is no significant difference in mean pulse rates between adult females and adult males. D. The confidence intervals overlap, so it appears that there is no significant difference in mean pulse rates between adult females and adult males.
Public Policy Polling recently conducted a survey asking adults across the U.S. about music preferences. When asked, 80 of the 571 participants admitted that they have illegally downloaded music. Without performing any calculations, describe how the confidence interval would change if the confidence level changed from 99% to 90%.

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