You work for a marketing firm that has a large client in the automobile industry. You have been asked toestimate the proportion of households in Chicago that have two or more vehicles. You have been assignedto gather a random sample that could be used to estimate this proportion to within a 0.03 margin of errorat a 99% level of confidence.a) With no prior research, what sample size should you gather in order to obtain a 0.03 margin of error?Round your answer up to the nearest whole number.n =householdsb) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required.You conduct a small preliminary sample, and you obtain a sample proportion of p= 0.21 . Using this newinformation. what sample size should you gather in order to obtain a 0.03 margin of error? Round youranswer up to the nearest whole number.n =households

a)When no prior research, the proportion (p̂) = 0.50Margin of error (E) = 0.03Confidence level =…

Answered: work for a marketing firm that has a…

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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My sister and I completed an experiment. she had o guess whether I was looking at her or not. The sample size was 10 as that's how many times I flipped a coin and asked them. Out of the 10 times she correctly identified whether I was looking or not 6 times. assuming this is at a 0.05 signifigance level, what is the sample porportion.
If the sample size is n=16 what is likely true about the shape of the population?
A researcher wants to examine how a new intervention helps children learn to read. A random sample of 25 kindergarten children is selected from a population with a mean score of 20 on a standardized reading test. After the four week intervention program, the children have an average of 22.2 with a SS of 384. Did the intervention improve reading in kindergarteners? What test would you use to measure this?
You want to estimate the percentage of small incorporated businesses that are owned by women. A previous study suggests that this percentage is 34%. How many of these small businesses must be surveyed if you want 97% confidence that you sample percentage is within three percentage points of the true population percentage?
You would like to estimate the proportion of all residents in favor of a new law with 98% confidence. It is initially believed that 30% of all residents will be in favor of the new law. Using this information, compute the smallest number of residents that must be sampled in order for the estimate to be within 6% of the true proportion.
You work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a 0.02 margin of error at a 95% level of confidence. a) With no prior research, what sample size should you gather in order to obtain a 0.02 margin of error? Round your answer up to the nearest whole number. n= households b) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required. You conduct a small preliminary sample, and you obtain a sample proportion of p = 0.18 . Using this new information. what sample size should you gather in order to obtain a 0.02 margin of error? Round your answer up to the nearest whole number. n= households
You work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a 0.02 margin of error at a 95% level of confidence. a) With no prior research, what sample size should you gather in order to obtain a 0.02 margin of error? Round your answer up to the nearest whole number. n = households
Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population proportion of 23.6%
A television sports commentator wants to estimate the proportion of Americans who follow professional football (NFL). What sample size should be obtained if he wants to be within 3 percentage points with 95% confidence? Assume he does not use any prior estimates.
USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1002 Chevrolet owners and found that 482 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use ? = 0.01. 1. What is the value of the sample test statistic? (Round your answer to two decimal places.) 2. Find the P-value of the test statistic. (Round your answer to four decimal places.)
Provide an example of a research project in your hometown where the one-sample chi-square test would be the most appropriate statistical technique to use. How would you make it a two-sample chi-square test?
For a sample of n=16 scores, how many scores are used to calculate the sample variance?

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