A researcher wishes to estimate the 90% confidence, the population proportion of adults who think congress is doing a good or excellent job. Her estimate must be accurate within 2% of the true proportion. (A) what is the minimum sample size needed assuming that no prior information is available? n=_____ (round to the nearest whole numberP) (B) what is the minimum sample size needed using a prior study that found that 32% of the respondents said they think congress is doing a good or excellent job? n= ____ (round to the nearest whole number) (c) compare results from a and b. A. having an estimate of the population proportion has no effect on the minimum sample size needed. B. Having an estimate of the population proportion reduces the minimum sample size needed. C. Having an estimate of the population proportion raises the minimum sample size needed.

A researcher wishes to estimate the 90% confidence, the population proportion of adults who think congress is doing a good or excellent job. Her estimate must be accurate within 2% of the true proportion. (A) what is the minimum sample size needed assuming that no prior information is available? n=_ (round to the nearest whole numberP) (B) what is the minimum sample size needed using a prior study that found that 32% of the respondents said they think congress is doing a good or excellent job? n= (round to the nearest whole number) (c) compare results from a and b. A. having an estimate of the population proportion has no effect on the minimum sample size needed. B. Having an estimate of the population proportion reduces the minimum sample size needed. C. Having an estimate of the population proportion raises the minimum sample size needed.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

The term observed frequency refers to____ the frequencies that are hypothesized for population being examined the frequency found in the population being examined the frequency found in the sample data
O Point Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.05; confidence level 90%; p and q unknown n = (Round up to the nearest integer.)
5
Please give a detailed explanation, not just the response. If possible, a way to work out the problem in Excel is helpful! Thanks in advance! You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 89%. You would like to be 90% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation. n=________
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 90% confident that you estimate is within 2% of the true population proportion. How large of a sample size is required? Hint: Video [+] n = Submit Question 近

I need help with parts a AND b (towards the bottom of the page), please and thank you
Please answer this
A random sample of Californians has a mean age of 34.4, but you want to know the mean age of all Californians. It sounds like you want to generalize from a ________ to a _________, and therefore you need to worry about ________. a. population; sample; descriptive statistics b. statistic; parameter; sampling error c. central tendency measure; variability measure; random selection d. sample; population; operational definitions
Please help with part e
You may need to use the appropriate appendix table or technology to answer this question. In order to estimate the difference between the average yearly salaries of top managers in private and governmental organizations, the following information was gathered. Sample Size Sample Mean (in $1,000s) Sample Standard Deviation (in $1,000s) ** Note $ Private 45 92 8 Governmental 53 82 9 Develop an interval estimate for the difference between the average yearly salaries of top managers of the two sectors. Use 95% confidence and give your answers in dollars. Use technology to find the critical value when df = 95. (Use Private Governmental. Round your answers to the nearest whole dollar.) the data table represents 1000's so be sure to answer the question in 1000's. Example: If the low bound is 7.365, the actual amount in thousands is 7365. to $
I have the answer to the first 3 i just need help with the last one
Please answer all of them