A random sample of 200 voters is selected and 40 are found to support a certain presidential candidate. If another poll survey will be conducted with 95% confidence level and 2% margin of error, what is the minimum sample size that must be obtained? O 4 O 60 16 15

Q: Construct the 99% confidence interval estimate of the population proportion p if the sample size is…

A: Obtain the 99% confidence interval estimate of the population proportion. The 99% confidence…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Statistical tests are used to calculate the test statistics which is eventually used to determine…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 7.8% of the students…

A:

Q: A political action group wants to conduct a poll to determine what percentage of people will vote…

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

Q: Two samples are taken with the following numbers of successes and sample sizes r1 = 25 r2 = 40 n1 =…

A: Given data,r1=25n1=72p1=r1n1=2572=0.347r2=40n2=78p2=r2n2=4078=0.513Construct a 92% CI?

Q: A survey of 300 union members in New York State reveals that 112 favor the Republican candidate for…

A: The value of x is 112 and n is 300.

Q: A poll is taken in which 327 out of 600 randomly selected voters indicated their preference for a…

A: It is given that sample size (n) is 600 and x is 327.

Q: A lawsuit claims that in a large company, the managers who are men make significantly more money…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Data given…

Q: Out of 400 people sampled, 156 preferred Candidate A. Based on this, find a 99% confidence level for…

A: given information : n=400 A=156 p=An p=156400   p=0.39

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: It is given that:

Q: Based on past experience, a hiring manager believes that less than one-third of applicants are…

A:

Q: In a hypothesis test, if the sample data is determined to be in the critical region with α = .05,…

A:

Q: In a survey, 32% of the respondents stated that they talk to their pets on the telephone. A…

A: Givenn=200x=60p^=xn=60200=0.3H0:P=0.32H1:P<0.32α=0.05

Q: Out of 500 people sampled, 30 preferred Candidate A. Based on this, estimate what proportion of the…

A: The 500 people are sampled out of which 30 preferred candidate A. That is, n=500,x=30. The…

Q: (b) Construct a 90% confidence interval for o² if the sample size, n, is 30. The lower bound is…

A: The sample variance is 12.2 and the sample size is 30.

Q: 6.24 Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787…

A: It is given that out of 2255 US adults, 1787 US adults use the internet regularly. Let pA be the…

Q: A 2015 survey shows that 45% of Snapchat users are between 18 and 24 years old. Suppose a folow-up…

A:

Q: A city is accused of having a non-diverse police force that does not fully represent the various…

A: a)   In this case, it is needed to test whether the ethnic make-up of the police force is consistent…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Here we need to calculate the value of the Z statistic.

Q: Based on a sample of 250 people, she obtains the following 99% confidence interval for the…

A: Given : 99% confidence interval for the population proportion, p: 0.113 < p < 0.171.

Q: A newspaper poll found that 52 percent of the respondents in a large random sample of likely voters…

A: We have given that the 95% confidence interval for the population proportion was computed to be 0.52…

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Step-by-step procedure to obtain the mean and the standard deviation using Excel is given below: In…

Q: (5) (a) A study is made to determine the proportion of voters in a sizable community who favor the…

A: We can answer just one question per post. Kindly repost part 5b) separately

Q: If n=12, ¯xx¯(x-bar)=44, and s=5, find the margin of error at a 99% confidence level

A: Given: margin of error for a 99% confidence interval. n=12 x¯(x-bar)=44 s=5

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: From the provided information, Sample size (n) = 50 The mean and standard deviation of the data can…

Q: If n=120 and p (p-hat) =0.31, find the margin of error at a 99% confidence level Give your answer to…

A: Sample size, n = 120 p^ = 0.31 99% confidence level

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Given table :…

Q: b) What is the minimum sample size needed to estimate the true proportion of adults who watch…

A: Given: Confidence interval =99% Level of significance, α=0.01 Standard error, e = 0.04 p = 0.5 from…

Q: In a past presidential election, 37,285,240 people voted for Candidate A; 37,201,620 for Candidate…

A: Percentage=value for the corresponding variable observationtotal value*100 The value range interval,…

Q: If n=13, = 42, and s=7, find the MARGIN OF ERROR at a 99% confidence level

A:

Q: A survey of 300 union members in New York State reveals that 112 favor the Republican candidate for…

A:

Q: Out of 400 people sampled, 376 preferred Candidate A. Based on this, estimate what proportion of the…

A: Given information Total people n = 400 No of candidate preferred Candidate A (x) = 376

Q: What is the lower bound of a 90% confidence interval for the percent of the population that would…

A: here given ,  In a sample of 235 people, 40% responded they would vote for candidate A.  p^ = 0.40…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Given: x = 54n=160p^=xn=54160=0.3375α=0.01 The test hypothesis are, H0: p = 0.37 H1: p < 0.37.…

Q: If a simple random sample of size 34 was collected, the following hypotheses tests will have the…

A: Correct answer is H0: μ=42  and H1: μ≠42

Q: A marketing researcher wishes to determine if over 60% of the wine drinkers prefer a certain brand…

A: It is given that Sample size n = 900 Number of drinkers prefer the brand of wine, X = 558

Q: A sample poll of 130 voters chosen at random from all voters in a given district indicated that 60…

A: Correct answer is (a).

Q: a recent poll, 210 people were asked if they liked dogs, and 42% said they did. Find the margin of…

A:

Q: P=,38 n= 500 Use the following to answer questions 10, 11, 12, 13, and 14. According to a report in…

A:

Q: Two samples are taken with the following numbers of successes and sample sizes 1 25 r2 27 n1 79 n2…

A: Confidence interval:The (1-α)100 % confidence interval for proportion p1 – p2 is given by,

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Confidence interval gives a range of values for the unknown parameter of the population. The width…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: When nothing known about the population proportion (p), Consider p=0.50. Find z-critical value:…

Q: 6. A newspaper plans to conduct a survey for the upcoming presidential election in order to estimate…

A: Given that  Margin of error (E) = 4% = 0.04 Confidence level (C) = 96%    We know that  Margin of…

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: The International Air Transport Association surveys business travelers to develop quality ratings…

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Solution: Let X be the rating for Miami. The given data is 8, 8, 4, 0, 5, 5, 5, 4, 4, 4, 4, 3, 10,…

Q: 3. Bob draws a simple random sample from an extremely large population of lemons.  The sample size…

A: Given that, x = 576, n = 925 The sample proportion is, Critical values: By using the z-tables, the…

Q: Out of 500 people sampled, 235 preferred Candidate A. Based on this, find a 99% confidence level…

A: Givenn=500x=235p^=xn=235500=0.47α=1-0.99=0.01α2=0.005zc=zα2=z0.005=2.5758  (from z table)