Show Intro/Instructions A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 5% margin of error at a 90% confidence level, what size of sample is needed? Hint: Textbook Video +1

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Option A is correct

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Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…

A: Given that  Sample size n =15 Degree of freedom =df =n-1

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

A: It is given that margin of error (E) is 0.03 and the confidence level is 99%.

Q: In 2011, a U.S. Census report determined that 65% of college students are working students. A…

A: 1. Determine the test statisticz = -0.58 2. Find the p-valueP-value = 0.5615 Explanation:Step 1:…

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A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: 405 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=D…

A:

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

A: It is given that margin of error (E) is 0.08 and the confidence level is 0.90.

Q: • The value of the test statistic is given by Vn • The p-value is the area under the curve to the…

A: Given : sample size, n =72 sample mean, x̄ =91.6 population standard deviation,σ=12.7…

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: It is given that sample size (n) is 986 and x is 522.

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: The given confidence level is, 95% The formula for calculating the level of significance α is,

Q: Use the sample data and confidence level given below to complete parts  (b)   A research institute…

A: Margin of error can be calculated as shown below.

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Solution: a. From the given information, n=2419 and X=1183.

Q: What shape do we need the sampling distribution of sample means to be to do a hypothesis test ?

A: In hypothesis test, sampling distribution of sample mean is Normal distribution. Normal distribution…

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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: Find the sample size of American adults you would need to predict the results of an election with a…

A: Given thatMargin of error (E) = 0.02 Confidence level (c) = 90% = 0.90Significance level (α) = 1 -…

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A: You are the operations manager for an airline and you are considering a higher fare level for…

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Q: b. Which group is more likely to have taken a vacation in the last year: college graduates or…

A: Given data:   Yes No Total College Graduate 183 67 250 Not a College Graduate 126 124 250…

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

A: n = 664Explanation:To calculate the sample size needed for a poll with a specific margin of error…

Q: Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   A…

A:

Q: According the April 12, 2017 Pew Research survey, 58% of Americans approve of U.S. missile strikes…

A: (3) Determine whether the normal approximation can be used with the given distribution or not?…

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

A: Given observation Error = 10% = 0.1 Confidence level = 0.99

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

A: Given data,E=4%=0.04letp=0.5z value at 95% confidence is Zc=1.96n=?

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Q: in a nation would skip an ortant event such rthday party ersary dinner to watc e pr Assume the…

A: given data, n=629x=433p^=xn=433629=0.6884α=0.10claim:p>0.66