A confidence interval for a sample is given, followed by several hypotheses to test using that sample. In each case, use the confidence interval to give a conclusion of the test (if possible) and also state the significance level you are using. (a) Ho: P = Conclusion: Significance level: 0.5 vs Ha: p = 0.5 Conclusion: (b) Ho: p= 0.81 vs Ha: p = 0.81 Significance level: Conclusion: Но (c) Ho: p = 0.39 vs Ha: p = 0.39 Significance level: Но Ho A 95% confidence interval for p: 0.43 to 0.78

Q: If n = 100 and p (p-hat) = 0.9, construct a 95% confidence %3D interval. Give your answers to three…

A: Givensample size(n)=100p^=0.9α=1-0.95=0.05α2=0.025zc=zα2=z0.025=1.96   (from z table)

Q: 1. A study in 2010 performed by called people on the phone asked 2251 US adults the question "Do you…

A:

Q: Using a t-table or a t-score calculator, find the value of t for sample size (n) of 25 to estimate…

A: Sample size n=25

Q: You calculate a risk ratio of 1.35, with a 95%Confidence Interval of (0.72, 5.5). How would you…

A: Given information: Risk Ratio=1.35 95%Confidence Interval of (0.72, 5.5) Decision Rule: If the risk…

Q: In the laboratory you analyzed a soft drink for its caffeine content with the following results:…

A:

Q: Explain in what situations you can use the z statistic to construct a confidence interval for the…

A:

Q: If n = 280 and ô (p-hat) = 0.8, construct a 90% confidence interval. Give your answers to three…

A: given data sample size (n) = 280p^ = 0.890% ci p.

Q: If n = 600 and p (p-hat) = 0.7, construct a 95% confidence interval. Give your answers to three…

A: It is given that, n = 600 and p (p-hat) = 0.7. we have to find the 95% confidence interval for true…

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A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: If n - 180 and p (p-hat) = 0.3, construct a 99% confidence interval. Give your answers to three…

A: Find z-critical value:…

Q: A poll taken in July 2010 estimates this proportion to be 0.34. Using this estimate, what sample…

A: Let p be the population proportion of adults who believe that economic conditions are getting…

Q: The confidence interval was (41%, 45%) What was the margin of error? +/- % What was the summary…

A:

Q: A sociologist wants to construct a 94% confidence interval for the proportion of teenagers who uses…

A: Given, p=0.23 E=0.02 z value at 94% confidence is Zc=1.88 n=?

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

Q: Suppose the data in the table below was found from a case-control study.  What measure of…

A: Provided data in the table was found from a case-control study. We need to construct the 95%…

Q: How does the 90% confidence interval compare to the 95 % interval?

A: Given data : How does the 90% confidence interval compare to the 95 % interval?

Q: What is the two-sample test formula? Step 1: Testing the claim that the difference in means is…

A: n1 = n2 = 59 x1 = 14.34x2 = 10.33 s1 = 10.82s2 = 10.34

Q: 2. We test if the proportion of females among AUM students is not 1/2. We collected a sample with…

A: Given: The sample number of AUM students is n=25. The number of females is X=20. The proportion of…

Q: If n= 208 and hatp = 0.46, construct a 95% confidence interval Round your answer to the three…

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

A: Given  e=Margin of error=8%, level of significance ɑ=0.10

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: How do you interpret the confidence interval. Select all that apply. We are 95% confident that the…

A: Solution: Given that, sample size n=15, sample mean x¯=0.287 and standard deviation s=0.069 then…

Q: The 96% confidence interval for a population proportion is (0.36, 0.48). Using the confidence…

A: Answer: From the given data, The 96% confidence interval of a population proportion is: (0.36, 0.48)

Q: What is the upper bound of the confidence interval? A 98% confidence interval for the data: 25, 38,…

A: We have given data, X 25 38 62 45 61 38 21 42 31 35 The confidence level is 1-α=0.98.

Q: A toy store would like to open a new store in the city of Thousand Oaks, and they would like to know…

A: A toy store would like to open a new store in the city of Thousand Oaks. Out of 100 households…

Q: Identify the t-score for a 90% confidence interval if the sample size is 25. t = The answer isnt…

A: We have given that Confidence level (c) = 90% = 0.90 Significance level (α) = 1 - c = 1 - 0.90 =…

Q: Given the jointly continuous random variables with the following: Solve for the joint density…

A: As per our guidelines I can solve only first 3 subparts. Post the remaining subparts again and…

Q: using the confidence interval method, to test that population mean equals 14, a researcher obtains…

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Q: economy of cars manufactured in 2012. Use these statistics to calculate a 98% confidence interval…

A: Lower bound=-5.400 Upeer bound =1.670

Q: We have conducted a one sided hypothesis test with a significance level α = 0.02. We would like to…

A: Given data we have conducted a one sided hypothesis test with a significance level α=0.02

Q: If n=540 and (p-hat) = 0.13, construct a 99% confidence interval. Give your answers to three…

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Q: Sales of trumpets in a day is modeled as Normal. A random sample of 36 days is looked at. The sample…

A:

Q: ude the per

A: The value of significance level is, α = 0.05. To construct a confidence interval with an equivalent…

Q: We have conducted a one sided hypothesis test with a significance level a = 0.10. We would like to…

A: Answer -  We have conducted a one sided hypothesis test with a significance level  α  = 0.10

Q: You are trying to calculate a confidence interval to estimate a population mean. After performing…

A:

Q: Last year your professor taught economics courses to N = 200 students. From this group you randomly…

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Q: You are interested in studying whether students living in the dorms or students living off campus…

A: given information : n1=35,n2=50m1=5.7, m2=6.3s1=1.4 ,s2=1.3 for obtain 99% confidence interval first…

Q: We have conducted a one sided hypothesis test with a significance level α = 0.01. We would like to…

A: Given :  We have conducted a one sided hypothesis test with a significance level α = 0.01

Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

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Q: Let's change our scenario a little. Suppose that a scientist wants to construct a 95% confidence…

A: Given : n1 = 112 x1 = 56 n2 = 107 x2 = 73

Q: Construct a 95% confidence interval estimate. How does this change your answer to (b)?

A: (d)

Q: If n=240 and X = 192, construct a 90% confidence interval. Enter your answer as an open-interval…

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Q: A very wise teacher measured brain activity in all 20 seniors in his Statistics class in the first…

A: We have to find p value for given testing.