A researcher wants to estimate the actual proportion of citizens of a certain country who feel that the president does an acceptable job after 30 months in office. His estimate will be with a 99% confidence interval. How many individuals must the researcher interview if he wants his estimate to be within 2%?

Q: In July of 2013, Australians were asked if they thought unemployment would increase, and 47% thought…

A: We have to test at  whether the proportion of people who thought that the unemployment is increases…

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: uring an election, Kevin and Britney took a poll of 1,200 voters, and asked what the most…

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

A: Step 1: Step 2: Step 3: Step 4:

Q: In a recent poll, 260 people were asked if they liked dogs, and 9% said they did. Find the margin of…

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Q: Kim wants to determine a 99% confidence interval for the proportion of high school students in a…

A: We have given that,  Population proportion (p) = 0.53, margin of error (E) = 0.03 and confidence…

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

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Q: those polled answered the economy. Construct a 93% confidence interval for the proportion of voters…

A: It is given that, the sample size, i..e, the sampled no. of voters, .The no. of voters, who answered…

Q: 9s

A: Margin of error =E =5%=0.05 90% confidence level

Q: You plan to construct a 90% confidence interval for the proportion of all middle school students who…

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Q: You want to estimate the proportion of all college students who traveled during spring break.   You…

A: Bhnjhhh

Q: e presidential election process reports many polls. You survey 40 college students and find that 70%…

A: Given data, n=40 p=70%=0.70 Find the 95% confidence interval to estimate the population proportion…

Q: A survey company polls 1,233 voters about whether they plan to vote for the Liberal or the…

A: Sample size 52% of voters prefer the Liberal candidate i.e., Significance level

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: Suppose you want to increase the level of confidence without reducing the precision. What can you…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: Emilio wants to estimate the percentage of people who have a financial adviser. He surveys 350…

A: given data  n = 350 x = 76 we have to interprete 99% confidence intervl.

Q: In one city, 59.6% of the 1500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given, Sample size=n=1500 p^=0.596 α=0.05

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: A poll of 2977 U.S. adults found that 28% regularly used Facebook as a news source. Find the margin…

A: Solution: Given information: n = 2977 Sample size  p^= 0.28  Sample proportion.

Q: Emma wants to estimate the percentage of people who use public transportation in a city. She surveys…

A: Obtain the margin of error. The margin of error is obtained below: The formula for the margin of…

Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the 95%…

A: From the provided information Sample size (n) = 600 65% said they received a flu vaccine that is…

Q: How many people should be surveyed to construct a 95% confidence interval with error = 3% to…

A: Given that Margin of error, E = 0.03 Population proportion, p = 0.15 Level of confidence = 95%

Q: For the 2011 season, suppose the average number of passing yards per attempt for a certain NFL team…

A: According to the provided information, the regression equation to predict the percentage of games…

Q: The national average for the percentage of high school graduates taking the SAT is 49%, but the…

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Q: Find  z for a  90% confidence level. Round your answer to two decimal places.

A: Given confidence level is 90% Significance level is 10%

Q: 4. A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the…

A:

Q: Nearly 10,000 U.S. Adults were asked their opinion regarding the legalization of marijuana. 10% of…

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Q: medicine. In a recent survey, 2500 teenagers are asked whether or not they use that particular…

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Q: The actual percentage of Americans who support same-sex relations is an example of a(n) a.…

A: Estimation is a process whereby we select a random sample from a population and use a sample…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: A research survey is commissioned to estimate the proportion of UK people who have traveled to…

A: Obtain the large sample size at 95% confidence level.   The large sample size is obtained below as…

Q: You're considering going to graduate school, and you would like to know how many people would…

A: Given: X= 6, N=28. Therefore, P=XN=628=0.214

Q: Construct the 99% confidence interval for the difference when 3-47688, -318.32, -42.11, -2680, -19,…

A: Test hypothesisNull Hypothesis H0: μ1=μ2Alternative Hypothesis Ha: μ1≠μ2For group 1 Sample size…

Q: You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You…

A: Suppose p is the true population proportion of workforce has two or more jobs.

Q: Angela is trying to figure out the sample size for the data set she wants to collect. She is…

A: The larger the sample size, the less will be the value of standard error. Therefore, the range of…

Q: The proportion of junior executives leaving large manufacturing companies within three years is to…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.