A research center survey of 2,750 adults found that 2,000 had bought something online. Of these online shoppers, 1,675 are weekly online shoppers. Complete parts (a) through (c) below. Question content area bottom Part 1 a. Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online.

A research center survey of 2,750 adults found that 2,000 had bought something online. Of these online shoppers, 1,675 are weekly online shoppers. Complete parts (a) through (c) below. Question content area bottom Part 1 a. Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Question content area bottom

Part 1

a. Construct a 95% confidence interval estimate of the population proportion of adults who had bought something online.

Definition Definition Method in statistics by which an observation’s uncertainty can be quantified. The main use of interval estimating is for describing a range that is made by transforming a point estimate by determining the range of values, or interval within which the population parameter is likely to fall. This range helps in measuring its precision.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: Given data

VIEW

Step 2: Solution

VIEW

Solution

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

In a survey of 3492 adults aged 57 through 85 years, it was found that 84.6% of them used at least one prescription medication. Complete parts (a) through (c) below. a. How many of the 3492 subjects used at least one prescription medication? 2954 (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication.
b. In the year 2000, a survey of 1171 U.S. adults were asked who they felt was the greatest President. Of those surveyed, 397 reported that Abraham Lincoln was the greatest President. Use this data to construct a 99% confidence interval for the population proportion of all U.S. adults who would say that Abraham Lincoln was the greatest president before the year 2000. Answer using decimals and round to four decimal places
In a survey of 3092 adults aged 57 through 85 years, it was found that 88.5% of them used at least one prescription medication. Complete parts (a) through (c) below. K @ a. How many of the 3092 subjects used at least one prescription medication? 2736 (Round to the nearest integer as needed.) b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. View an example Get more help. 2 %
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
In a survey of 3213 adults aged 57 through 85 years, it was found that 83.9% of them used at least one prescription medication. Complete parts (a) through (c) below. a. how many of the 3213 subjects used at least one prescription medication? b. construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication. c. what do the results tell us about the proportion of college students who use at least one prescription medication?
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
The National Association of Colleges and Employers sponsors the Graduating Student and Alumni Survey.Part of the survey gauges student optimism in landing a job after graduation. According to one year’s surveyresults, published in American Demographics, among the 1218 respondents, 733 said that they expecteddifficulty finding a job. Construct a 90% confidence interval for the proportion of students who expecteddifficulty finding a job. Interpret your result.
In a poll, 1100 adults in Nantucket were asked about their computer gaming habits. One finding was that 43% of respondents never computer game. Find and interpret a 95% confidence interval for the proportion of all adults in Nantucket who never play computer games
Answer Part B
Suppose we wish to estimate the average number of hours per week that Americans watch TV. Use the following data from an SRS to find a 90% confidence interval: 30 64 49 40 21 58 9 43 39 43
Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities in a country. Construct a 95% confidence interval. What does the result tell us about the population of all celebrities? Do the data appear to be from a normally distributed population as required? 245 210 186 168 166 163 156 156 156 156
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=1005 and x=534 who said "yes." Use a 99% confidence level. LOADING... Click the icon to view a table of z scores. Question content area bottom Part 1 a) Find the best point estimate of the population proportion p. enter your response here (Round to three decimal places as needed.) Part 2 b) Identify the value of the margin of error E. E=enter your response here (Round to three decimal places as needed.) Part 3 c) Construct the confidence interval. enter your response here<p<enter your response here (Round to three decimal places as needed.) Part 4 d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. A. One has 99% confidence that the interval from the lower bound to the upper bound…