Researchers at a reputable university and a reputable health organization claim that approximately 76% of people believe "tranquilizers work very well to make a person more calm and relaxed." Of the next 75people interviewed, what is the probability that(a) at least 52 are of this opinion?(b) at most 58 are of this opinion?Click here to view page 1 of the standard normal distribution table.Click here to view page 2 of the standard normal distribution table.

The question is about normal approximation to the binomial dist. Given : Popl. prop. of people…

Answered: Researchers at a reputable university…

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 #4
High school students across the nation compete in a financial capability challenge each year by taking a National Financial Capability Challenge exam, students who score in the top 19 percent are recognized publicly for their achievement by the Department of Treasury. Assuming a normal distribution, how many standard deviations above the mean does a student have to score to be recognized?
Researchers at a reputable university and a reputable health organization claim that approximately 77% of people believe "tranquilizers work very well to make a person more calm and relaxed." Of the next 80 people interviewed, what is the probability that (a) at least 52 are of this opinion? (b) at most 58 are of this opinion? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. (a) The probability is (Round to four decimal places as needed.) (b) The probability is (Round to four decimal places as needed.)
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In a poll, 51% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 2%, and the estimate was made with 94% confidence. At least how many people were surveyed? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). The minimum number of surveyed people was (Round up to the nearest integer.)
In a survey of 1007 adults, a polling agency asked, "When you retire, do you think you will have enough money to live comfortably or not. Of the 1007 surveyed, 525 stated that they were worried about having enough money to live comfortably in retirement. Construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Click here to view the table of critical t-values. Click here to view the table of critical values of the chi-square distribution. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) O A. There is 90% confidence that the true proportion of worried adults is between and B. 90% of the population lies in the interval between and. C. There is a 90% probability that the…
"In a standard normal distribution, what is the mean? Options: A. -1 B. O C. 1 D. 2"
In a survey conducted by a reputable marketing agency, 241 of 1000 adults 19 years of age or older confessed to bringing and using their cell phone every trip to the bathroom (confessions included texting and answering phone calls). Complete parts (a) through (f) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the sample in this study? What is the population of interest? Determine the sample in this study. Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The sample is all adults with a cell phone. O B. The sample is all adults 19 years of age or older. O C. The sample is the adults 19 years of age or older. (Type a whole number.) O D. The sample is all adults.
According to a study, the proportion of people who are satisfied with the way things are going in their lives is 0.80. Suppose that a random sample of 100 people is obtained.
You can tell if a distribution is normal because it is Approximately bell-shaped and symmetrical Skewed to the right or left Empirical and statistically significant Independent

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