A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with access, so she randomly sampled 458 undergraduates and found that 205 had access. Estimate the true proportion with 95% confidence. Round intermediate answers to four decimal places. Round your final answer to two decimal place.

Q: Using a random sample of 3800 TV households, a media research company found that 50.3% watched the…

A:

Q: (a) What percent of the scores are less than 19? (b) Out of 1500 randomly selected scores, about how…

A: mu = 19.9 s = 5.1

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: It is given that margin of error (E) is 0.04 and the confidence level is 99%.Here,

Q: An apple, 37% of the people polled answered yes to the question "are you in favor of the death…

A: The provided information is: Sample proportionsp^=0.37 Margin of errorE=0.03 Level of…

Q: Suppose you select a simple random sample of 75 Douglas College students, and you find that 8 are…

A: The point estimate of the population proportion is the sample proportion. Given that, 8 out of the…

Q: an you conclude that the percentage of people aged 18-29 who have a tattoo is less than 25%

A: Given : n=830 , X=166 , p0=0.25 , α=0.01 The estimate of the sample proportion is ,…

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

A:

Q: A random sample of 324 residents of a community revealed that 30% were very satisfied withthe…

A: Given that, Critical values: By using the standard normal table of Z, the critical value for two…

Q: Find the margin of error if the sample proportion is 0.37 and the sample size is 300. on Consider…

A: Margin of error is the error due to random sampling. The margin of error decreases with increase in…

Q: A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a…

A: Given,          Sample proportion  P∧=0.09          Margin of Error∈=0.04          and…

Q: a. Out of a random sample of 74 birds, how.many would you expect to live longer than 9 years? b.…

A: Let X = number of years a bird lives.  Then, X ~ Exponential (0.125) Thus,  f(x) = 0.125e-0.125x .

Q: Thirty five percent of adults Americans are regular voters.  A random sample of 250 adults in a…

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

Q: A sample consisting of 410 men and 795 women was asked various questions pertaining to international…

A: To find the male sample, female sample and the combined sample :

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A:

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: A poll asked 800 people their choice for mayor. What is the approximate margin of error for a 95%…

A: Given: P=0.5 q=0.5 z-critical value for 95% confidence interval is 1.96. The approximate margin of…

Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given,   Margin error = 0.02 Population proportion = 0.36   The objective is to find the sample…

Q: A survey asked, "Do you think that homeless people are responsible for the situation they are in?"…

A: Solution: a. Let X be the number of Americans who think that homeless people are not responsible and…

Q: A sample consisting of 952 men and 543 women was asked various questions pertaining to the nation's…

A: Given that a sample consisting of 952 men and 543 women was asked various questions pertaining to…

Q: A researcher studying the proportion of 8 year old children who can ride a bike, found that 219…

A: Given: n= 567 ,x= 219.0 Need to find sample proportion.

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

Q: A polling agency wants to determine the percentage of voters in favour of extending tax cuts. they…

A: Given information- Margin of error, E = 2% = 0.02 Confidence level, c = 95% Since nothing is known…

Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

A:

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny . What…

A: A) Sample size obtained when he uses a previous estimate of 32%. As given he wishes the estimate to…

Q: A researcher wishes to be 95% confidence that her estimate of the true proportion of individuals who…

A: Given that  Confidence level (C) = 95%  The true proportion of individuals who travel overseas is…

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A:

Q: A newspaper reported the results of a political poll about which candidate likely voters preferred,…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: The margin…

Q: You have been hired by a consortium of local car dealers to conduct a survey about the purchases of…

A: Given: Confidence level = 95% Margin of error = 0.03 Formula Used: n = ZαMargin of error2 p(1-p)

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the…

A: Givensample size(n)=100p^=0.47

Q: 2) Estimate the difference between the ages of male and female respondents with 95% confidence.

A: Given information:   Female Male Mean 47.15625 44.16667 Sum 1509 795 S.D 14.14923 19.87979…

Q: The sampling plan: n = 350 and c = 1, meets a confidence-reliability of (95%, 99%) A. True or False.…

A:

Q: Another pilot study During routine screening, a doctornotices that 22% of her adult patients show…

A: Computing the sample size: The confidence level is 98%. Therefore, α = 0.02 and α/2=0.01. The margin…

Q: A Harriss poll taken surveyed 2016 adults and found that 423 of them had one or more tattoos. can…

A: The hypotheses for the test is given below.Null hypothesis:H0: p = 0.25Alternative hypothesis:H1: p…

Q: how many subjects are needed to estimate the mean number of books read the previous year with six…

A: It is given that confidence level is 0.90, standard deviation is 11.3 and margin of error E is 6.

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A: State the hypotheses.

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny What size…

A:

Q: what sample size should a researcher take if he wants to estimate a population proportion to be 2%…

A: From the given information,   Margin error = 0.02 Assume sample proportion = 0.5   Critical value:…

Q: 2. On a placement examination, August scored lower than 1210 of 12,860 students who took the exam.…

A: Given information: On a placement examination, 12860 students appeared. Among these 12860 students,…

Q: What sample size is needed to give a margin of error within ±3%±3% in estimating a population…

A: We have given that,  Population proportion (p) = 0.4, margin of error (E) = ±3% = 0.03 and…

Q: The manager of a city recreation center wants to estimate the percent of city residents who favor a…

A: The confidence interval for the population proportion (single sample) is obtained by using the…

Q: Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease…

A: According to the provided information, n=153x=32p=xn=32153=0.209

Q: A market researcher wishes to determine the proportion of American consumers who shop online for…

A:

Q: A study found that 13% of Americans have seen or sensed the presence of an angel. A contingent…

A:

Q: If a 95% Confidence for the Population Proportion is (0.56, 0.78), fınd its Margin of Error.

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given that: p= previous estimate = 32% =0.32 e= error= 3%=0.03 z=critical value for confidence…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.