In a public opinion survey, 60 out of a sample of 70 high-income voters and 90 out of a sample of 100 low-income voters supported the introduction of a new national security tax. a/ Estimate, with 95% confidence level, the true proportion of low-income people who will vote for the introduction of the tax. b/ Can we conclude at the 5% level of significance that the proportion of high-income voters favoring the new security tax is lower than that of low-income voters?

Q: Suppose a polling agency reported that 47.3% of registered voters were in favor of raising income…

A: We have given that  best point estimate of proportion p^ = 47.3% = 0.473 Sample size n = 1001 Margin…

Q: recent poll, 490 people were asked if they liked dogs, and 45% said they did. Find the margin of…

A: Given that  Sample size n =490 Sample proportion p=45%=0.45

Q: recent poll, 470 people were asked if they liked dogs, and 40% said they did. Find the margin of…

A: The critical value at 99% confidence level from standard normal table will be:   Following…

Q: Suppose that the state of Nebraska wants to take a poll on the proportion of its citizens who…

A: Sample size: The minimum sample size for a desired confidence level, α with a given margin of error,…

Q: In a recent poll, 420 people were asked if they liked dogs, and 9% said they did. Find the Margin of…

A: Given: Sample size=n=420,Number of people who liked dogs:x=420×9100=37.8≈38,Significance…

Q: A survey of 865 voters in one state reveals that 408 favor approval of an issue before legislature.…

A: According to information provided, Number of favorable cases (X) = 408         Total number of cases…

Q: A gubernatorial candidate wants to analyze how she is performing with different.age groups. Her…

A: We are 99% confident the difference in population proportions of people 18-24 years old who plan to…

Q: 9) The Genetics and IVF Institute conducted a clinical trial of the YSORT method designed to…

A:

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Here we need to find the required sample size. Since nothing is mentioned about the population…

Q: A New York Times Poll on women’s issues interviewed 1025 randomly selected women and 472 randomly…

A: Given: There is 95% confidence that between 44% and 50% of all women would say that they do not get…

Q: Obtain a 95% confidence interval for the difference between the proportion of males and females who…

A: Given data 25% of a random sample of males plan to vote yes of a random sample of 60 32% of a random…

Q: A Gallop poll wants to determine the proportion of people who plan on voting for neither the…

A: From the provided information, Total respondents (n) = 500 Number of people who say they plan on…

Q: Suppose that a market research firm is hired to estimate the percentage of adults living in a large…

A: From the given information, x=64 and n=94.

Q: 4. A college dean reported that 80% of all students majoring in Math are males. If 62 out of the 80…

A: 4] Followings are the explanation of the question  Use the One sample z proportion test   The…

Q: In a recent poll, 290 people were asked if they liked dogs, and 40% said they did. Find the Margin…

A:

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: In a recent poll, 310 people were asked if they liked dogs, and 40% said they did. Find the Margin…

A: Given data: n = 310p⏞ = 40100=0.40C.I = 99%      =0.99Then, calculate αα = 1-0.99   =0.01Now,…

Q: In a study, 68% of 900 randomly selected adults said they believe the Republicans favor the rich. If…

A: Given that, P⏞=68%=0.681-P⏞=1-0.68=0.32n=900E=2%=0.02 Now,…

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: GivenMargin of error(E)=0.025Confidence level(c)=90%Assume p=0.5

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: The random variable X follows binomial distribution. The margin of error is 0.08. The level of…

Q: A state’s Department of Commerce reports that 82 percent of all small businesses that applied for a…

A: The margin of error is, E = 0.0525, If the prior information is unknown, assume the value of sample…

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: The random variable percentage of people in the community that supports him/her follows binomial…

Q: A TV news reporter says that a proposed constitutional amendment is likely to win approval in the…

A: The random variable vote percentage follows binomial distribution. The sample size is 2500. The…

Q: The researchers found that 53% of the women and 56% of the men believe that the U.S. federal…

A: In order to determine whether the difference between the proportions of women and men who believe…

Q: 3. A medical technologist claims that 25% of the chain-smokers are teenagers. After making a survey…

A: 3)Givensample size(n)=42x=8p^=xn=842≅0.1905Confidence level=95%α=1-0.95=0.05

Q: In a recent research poll, 83.4% of 500 randomly selected men in the U. S. knew the name of our…

A: There are two independent samples which are men and women. We have to construct 95% confidence…

Q: A pollster is going to sample a number of voters in a large city and construct a 98% confidence…

A: Given: Confidence level is 98% Margin of error is 0.05 Required: To find the sample size.

Q: In a random sample of 400 residents of Nassau County, 320 residents indicated that they voted for…

A:

Q: A survey was given to a random sample of 230 residents of a town to determine whether they support a…

A: Given,   Sample size = 230 Sample proportion = 0.30   Critical value: Using z-table, the z-critical…

Q: recent poll, 250 people were asked if they liked dogs, and 52% said they did. Find the margin of…

A:

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Given data, E=6%=0.06 z-value at 99% confidence is Zc=2.576 Let p=0.5 n=?

Q: A poll by a reputable research center asked, "If you won 10 million dollars in the lottery, would…

A: Given that  Sample size n = 1175 Number of adults who would continue working, X = 856 The critical…

Q: In an exit poll of 625 scientifically and randomly selected voters, 340 expressed support for…

A: The  sample proportion of voters in the poll who support Carpetbagger can be  calculated as: Thus,…

Q: In a sample of 64 randomly selected students, 33 favored the amount being budgeted for next year's…

A: Given information: It is given that among a sample of 64 randomly selected students, 33 favored the…

Q: college administrator collects data on a nationwide random sample of 382 students enrolled in M.B.A.…

A: We associate with the interval estimate is called a confidence interval. This probability indicates…

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

A: Given information- Confidence level, c = 98% Population proportion of all New York State union…

Q: A recent survey showed that 42% of US employers were likely to require higher employee contributions…

A: The proportion of all companies likely to require higher employee contributions for health care…

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Given information Error = 5% = 0.05 Confidence level = 0.95

Q: In a recent poll, 390 people were asked if they liked dogs, and 83% said they did. Find the Margin…

A: We want to find the margin of error

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

A: When nothing is known about the proportion, consider population proportion to be p=0.50…

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A:

Q: In a sample of 150 people from town A, 45% planned to vote for the proposition.  In a sample of 200…

A: From the provided information,

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: We have to find sample size for given data..

Q: Estimate, with 95% confidence level, the true proportion of low-income people who will  vote for the…

A: Given : In a public opinion survey, 80 out of a sample of 100 high-income voters and 55 out of a…

Q: A random sample of 1,000 voters was drawn and asked on a bipartisan basis about their voting…

A: Givensample size(n)=1000x=610confidence interval=95%

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A:

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Given, Margin of error = 9% and 99% confidence interval. Here, Proportion is not given, hence we…

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Using Excel formula "=NORM.S.INV(1-(0.01/2))" (or standard normal distribution table), the z-value…