The International Brotherhood of Slide Whistlers wants to conduct a survey to find what proportion of its members have more than one slide whistle. If they want the margin of error to be 3% or less, how large a sample should they take?

Q: As the saying goes, any man should accomplish three things in his life: build a house, plant a tree,…

A: Given that p= 13% = 0.13 So q= 1-p= 1-0.13 = 0.87 Margin of error= 5% = 0.05 Z at 95% confidence…

Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

A:

Q: Suppose that the results of a survey show that 41% of people consider summer as their favorite…

A: Solution: The sample size formula is given as below: n = p*q*(Z/E)^2 We are given p = 0.41 q = 1 – p…

Q: What fraction of survey respondents identified themselves as Republicans? What fraction of survey…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks Given :

Q: legally purchase alcohol in the State of Oregon (students who are 21 or over). If we want the margin…

A: Given that  Margin of error =E =5% =0.05 90% confidence interval.  NOTE:- According to bartleby…

Q: The U.S. Air Force requires that pilots have heights between 64in and 77in. The heights of women are…

A: Obtain the percentage of woman meeting the height requirement. The percentage of woman meeting the…

Q: A survey of 225 residents of a neighborhood indicates that 135 of them are in favor of having a…

A: Given, total residents = 225 135 are in favor of block party.

Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: A soccer team won 24 of 36 games in the first season. If the team had the same ratio of wins to…

A:

Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

A:

Q: A    national    polling    organization    wants    to    be    95%    confident    that    its…

A:

Q: If the sociologist can sample 100 women, what will the margin of error be?

A:

Q: If 55% of the books have been signed out, what percent of the books have not been signed out?

A: Given that: According to the question, 55 % of the books have been signed out. Signed  out=55…

Q: In a sample of 45 men, 27 said that they had less leisure time today than they had 10 years ago. In…

A:

Q: On the Planet Zog, 50% of the population like watching sport, 60%of the population like listening to…

A:

Q: In October 2017, the Gallup Poll asked a sample of 10281028 U.S. adults, "Are you in favor of the…

A: Given, n=1028 Consider that the population standard deviation is σ, the level of significance is α.…

Q: Among survey respondents who thought the economy was getting better, what fraction were Democrats?…

A: Given -   Better Same Worse Total Republican 38 104 44 186 Democrat 12 87 137 236 None 21…

Q: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: A person rolls a 10-sided die once. What are the odds that the number rolled is not greater than or…

A: As per given by the question, What are the odds that the number rolled is not greater than or equal…

Q: A telecommunications company conducted a survey about cell phone companies. Of 1800 randomly and…

A: given  x = 1275 preferred AT&T to Sprint n =Of 1800 randomly and independently selected people…

Q: You survey 100 people and find that 75 of them would prefer to work at home to some extent. When…

A: Given: You survey 100 people and find that 75 of them would prefer to work at home to some extent.…

Q: Suppose that the results of a survey show that 35% of people consider summer as their favorite…

A: Critical value: Using the z-table, the critical value at 95% confidence level is

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

Q: a nutritionist wishes to determine, within 3% the true proportion of adults who do not eat lunch. if…

A:

Q: Suppose that the results of a survey show that 46% of people consider summer as their favorite…

A: The following information is available in the question

Q: a pollster plans to improve survey results by only conducting polls in which the margin of error is…

A:

Q: create 2 sample word problems of antidifferentiation with solutions

A: First problem: The rate of water out of a faucet is rt=t3, where t is the number of minutes from the…

Q: If you double the sample size in a poll, what effect does that have on the margin of error? By what…

A: The margin of error can be calculated in two ways, depending on whether you have parameters from a…

Q: What is the margin of error for a poll with a sample size of 1450 people? If you round the answer to…

A: We know that   Margin of error  for a pole with n people is given by   Margin of error=±100n

Q: At a local Dunkin'donuts, a survey showed that out of 1280 customers eating lunch, 640 ordered…

A:

Q: If you draw a random card from a standard deck of 52 cards, what are the odds of drawing a jack?…

A: Given data: The total numbers of cards are n=52. The numbers of jacks in the playing deck of the…

Q: Jason reads a report that says 80% of U.S. high school students have a computer at home. He believes…

A: Given- p=claimed proportion =80%=0.8   and   n=sample size=60 To check- The conditions are satisfied…

Q: if you answer 36 problems correctly on a 42 question test what percentage of the problems did you…

A: if you answer 36 problems correctly on a 42 question test what percentage of the problems did you…

Q: Paradise Resort has a total of 350 lounge chairs. If 210 chairs are under umbrellas, what percent of…

A:

Q: If the proportion of Heads is .25 out of 200 flips, what is the p-value? Round to three places.

A: Given : The proportion of Heads is .25 out of 200 flips.

Q: If the proportion of Hs is .45 out of 200 flips, what is the p-value?

A: Solution-: Given : We find p-value=?

Q: Suppose that the results of a survey show that 41% of people consider summer as their favorite…

A:

Q: In a series of houses actually invaded by smallpox, 70% of the inhabitants are attacked and 85% have…

A: Suppose A & B be two events. Then we know, (A∪B)=(A)+(B)-(A∩B). Consider from the problem that,…

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, below what…

A: From the given data The US population is 13% African American

Q: Among survey respondents who thought the economy was getting better, what fraction were Republicans?…

A: Instruction : "I only need help with the last 2 please" Given : Total respondents  =651

Q: Suppose that the result of a public opinion poll shows that just 10% of people would be willing to…

A:

Q: According to the results of a survey, 40% of 396 Leople indicated that American football is their…

A: Given Data: p^=0.4   Margin of error=0.04   Assuming significance level of 0.05 z0.05/2=1.96

Q: If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.

A: We have given that Sample proportion =0.45 Sample size (n)=50 flips  Population proportion p=0.5…

Q: Suppose that the results of a survey show that 40% of people consider summer as their favorite…

A: Given Data: Let 'n' be sample size p^=0.4 Margin of error=0.04   Assuming level of significance to…

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

Q: If 6units get 50% and 50units get 25%, how much percentage does 27 get?

A: If 6units get 50% and 50units get 25%, how much percentage does 27 get?

Q: Four players from the NBA and their career 3-point percentage are listed below. 3-point percentage…

A: Given that percentage of 2 pointers made is given by        p  = number of 3 pointers made(n)number…

Q: According to the Business and Financial Times newspaper, through January 25, 2018, majority of…

A: Given that there are 162 companies. The number of companies showed beat estimates is 104. The number…

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.