The graph below shows the results from constructing 100 different confidence intervals of the same confidence level, each based on a different sample of size n =75 from a population in which the population proportion is p=0.8. Each vertical line in the figure below spans the length of a different confidence interval. 1.0- 0.9- 0.8 0.7 0.6- 0.5 0 20 40 60 80 100 Sample Number Based on these results, what is the most likely value of the confidence level used in constructing these confidence intervals? (A) 75% (B) 80% (C) 90% (D) 99% (E) 100%

Q: Use the given data to construct a 98%confidence interval for the population proportion p x = 52 , n…

A: We have given that,  Favorable cases (X) = 52 and sample size (n) = 69 Then,  We will find the 98%…

Q: If n=32, ¯xx¯(x-bar)=31, and s=14, construct a confidence interval at a 95% confidence level. Assume…

A: Given: x¯=31n=32s=1495% confidence level

Q: If n=30, ¯xx¯(x-bar)=43, and s=16, construct a confidence interval at a 98% confidence level. Assume…

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Q: If n = 10, ¯xx¯ = 43, and s = 8, construct a confidence interval at a 90% confidence level. Assume…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: Construct a 95% confidence interval for the proportion of people who performed any volunteer work…

A: It is given as Favourable cases, x = 517Sample size,, x = 517Confidence level = 95%

Q: If n=16, ¯xx¯(x-bar)=46, and s=12, construct a confidence interval at a 95% confidence level. Assume…

A: Given n=16 x=46 s=12 CL=95% Data is normally distributed

Q: a. A researcher collects a sample of 31 measurements from a population and wishes to find a 99%…

A: Given : A researcher collects the sample of 31 measurements from a population and wishes to find a…

Q: A pharmaceutical company is running tests to see how well its new drug lowers cholesterol. Twelve…

A: The objective of this question is to construct a 99% confidence interval for the true mean…

Q: If n=22, ¯xx¯(x-bar)=45, and s=4, construct a confidence interval at a 90% confidence level. Assume…

A: Ans -   Given the level of confidence interval   90 %                      Then   α = 1 - 0.90 =…

Q: The following gives information about the proportion of a sample that agree with a certain…

A: Given, X=112' n=400

Q: If n=15, ¯xx¯(x-bar)=30, and s=2, construct a confidence interval at a 98% confidence level. Assume…

A: Given Sample size n = 15  degree of freedom = n-1 =14 x the level of confidence interval   98 %…

Q: If n = 22, ¯xx¯ = 36, and s = 14, construct a confidence interval at a 98% confidence level. Assume…

A: From the provided information, Sample size (n) = 22 Sample mean (x̄) = 36 Standard deviation (s) =…

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: What is the value of the point estimate for our 90% confidence interval? Round your answer to three…

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Q: Assuming that the population is normally distributed, construct a 95% confidence interval estimate…

A: The question is about confidence intervalGiven :To find :1 ) 95 % CI estimate for the popl. mean…

Q: If n=19, ¯xx¯(x-bar)=37, and s=13, construct a confidence interval at a 99% confidence level. Assume…

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Q: A random sample of 318 students from a large college was asked if they plan to visit family during…

A: The CI is given to be (0.78, 0.98). point estimate is the midpoint of the interval. Let Margin of…

Q: If n=22, ¯xx¯(x-bar)=46, and s=8, construct a confidence interval at a 98% confidence level. Assume…

A: It is given that mean and standard deviation are 46 and 8, respectively.

Q: Which of the following would result in the narrowest confidence interval? A. 80% confidence level…

A: The narrowest confidence interval will result from larger sample size and a smaller confidence…

Q: n=31, ¯xx¯(x-bar)=30, and s=5, construct a confidence interval at a 98% confidence level. Assume the…

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Q: A history teacher records the SAT scores of all 87 of her students. The data is used to construct a…

A: For calculating the confidence interval, we need to satisfy the following conditions: Independence…

Q: A sample of 23 plants was taken and the mean height was 27 cm. A 95% confidence interval for the…

A: From the given information, The 95% confidence interval for the true mean height of plants of that…

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: Solution: The confidence interval for the population mean is calculated by using the following…

Q: Which of the following would we not be able to compute a confidence interval for? Group of answer…

A: Introduction: Since all the options are related to population average, we have limited our…

Q: A sample of size 84 was taken from a very large population. Sample statistics, x¯ and s, were used…

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

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Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: Latasha is a waitress at Seventh Heaven Hamburgers. She wants to estimate the average amount each…

A:

Q: If n=19, ¯xx¯=40, and s=7, construct a confidence interval at a 99% confidence level. Assume the…

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Q: If n=15, ¯xx¯(x-bar)=40, and s=9, construct a confidence interval at a 98% confidence level. Assume…

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Q: If the number of smokers in a sample of 40 students selected from university A is 12 and the number…

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Q: he AC breakdown voltage of an insulating liquid indicates its dielectric strength. The following are…

A: Obtain the 95% confidence interval for the true average breakdown voltage. The 95% confidence…

Q: If n=41, ¯x=39, and s=16, construct a confidence interval at a 99% confidence level. Assume the data…

A: Given that  Sample size (n) = 41 Sample mean (x¯) = 39 Sample standard deviation (s) = 16 Confidence…

Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

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Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: If the sample size increases, then the standard error of statistic decreases. The margin of error is…

Q: If n=13, ¯xx¯(x-bar)=37, and s=9, construct a confidence interval at a 80% confidence level. Assume…

A: Givenn =13x = 37s=9confidence interval =80%

Q: A sample of freshman takes a reading comprehension test and their scores are summarized below.…

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Q: ← Here are summary statistics for randomly selected weights of newborn girls: n=242, x=33.8 hg,…

A: Given The data is as follows: n=242x¯=33.8s=7.8CL=0.95

Q: An insurance company selected samples of clients under 18 years of age and over 18 and recorded the…

A: Given Information: Under age of 18  n1=480 x1=160 Over age of 18 n2=500 x2=140

Q: If n = 220, p-hat = 0.4, then what will be the 90% Confidence Interval for the population…

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Q: 15, ¯xx¯(x-bar)=39, and s=11, construct a confidence interval at a 95% confidence level. Assume the…

A: Sample size (n) =15 Sample mean (x¯)=39 Sample standard deviation (s)=11 Confidence level (C)=95%…