Out of 600 people sampled, 456 had kids. Based on this, construct a 95% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places _______

Q: Use the sample data and confidence level to construct the confidence interval estimate of the…

A: We have given that the sample size 550, favourable number of cases X=385 and confidence level is…

Q: A student reported a 95% confidence interval of [3.21,4.29] What is the mean of the data set?…

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

A: It is given that, the number of respondents said yes (x) is 587 and the sample size (n) is 912.  The…

Q: A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home…

A: Given n=40 N=100 a. Population proportion is given as- p^=nN=40100=0.4 b. Margin of error is given…

Q: In a recent survey of 750 people, 600 people claimed to watch football.  Construct a 95% confidence…

A: Solution: 9. Let X be the number of people who watch football and n be the sample number of people…

Q: Educational Television In a random sample of  200  people,  140  said that they watched educational…

A: Given data, n=200 x=140 sample proportion p=xnp=140200p=0.7z-value at 99% confidence is Zc=2.576

Q: In order to construct the 95% confidence interval, you choose which formula? O x ±1.645 × OT ±1.96 x…

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Q: Based on a survey of a random sample of 900 adults in the United States, a journalist reportS that…

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Q: In a survey of 2282​ adults, 749 say they believe in UFOs. Construct a 90% confidence interval for…

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Q: In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard…

A: Let us consider a random variable X it represents the efficiency of electric motors. Here random…

Q: You measure 38 dogs' weights, and find they have a mean weight of 62 ounces. Assume the population…

A: Given mean weight of 62 ounces. standard deviation is 10.8 ounces. construct a 99% confidence level

Q: one city, 79.6% of the 8500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given n=8500

Q: Assume that all necessary conditions were met for creating a confidence interval for a proportion.…

A: The estimated proportion CI is expected to include the true proportion, provided that we are…

Q: A survey of 662 men shoppers found that 25% of them shop on impulse. What is the 90% confidence…

A: According to the given information, we have Confidence level = 90% = 0.90 Sample size, n = 662 Given…

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

Q: Travel to Outer Space A CBS News/New York Times poll found that 329  out of 763 randomly selected…

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Q: In a survey of 2271 ​adults, 714 say they believe in UFOs.   Construct a 99% confidence interval for…

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Q: Left-handed people are rare. Suppose a researcher conducts a survey of 30 people and finds that 4 of…

A: The random variable left-handed people follow normal distribution. We have to construct the 95%…

Q: Educational Television In a random sample of 195 people, 142  said that they watched educational…

A: Given data, n=195 x=142 p=x/n=0.728 z-value at 99% confidence is Zc=2.576

Q: Aaliyah wants to know if there is a difference between the proportions of customers who just order…

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Q: Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…

A: given that,possible chances (x)=329size(n)=763success rate ( p )= x/n = 0.43119

Q: For each confidence interval procedure, provide the confidence level. (Round the answers to the…

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Q: Which of the following is the correct interpretation of a 90% confidence interval of a proportion? A…

A: Given information- Confidence level, c = 0.90 We know that confidence interval gives us a range of…

Q: Look at the confidence intervals described in the four options below.  Then, imagine that for each…

A: Solution-: Look at the confidence intervals described in the four options below.  Then, imagine that…

Q: a. Find the point estimates for the population mean and the population standard deviation for the…

A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

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Q: Which of the following indicates a confidence interval? a. 0.95              b.99%               c.…

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Q: Educational Television In a random sample of 190 people, 144  said that they watched educational…

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Q: Find the 90% confidence interval of the true proportion of people who watched educational…

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Q: A: In this example, ud is the mean value of the differences d for the population of all pairs of…

A: The following information has been provided:   Sample 1 = Friday 6th Sample 1 = Friday 13th…

Q: Which one of the following statements about confidence intervals is false?   Given the same sample…

A: In this case, we need to identify the false statement for confidence interval.

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: We have given 90% confidence interval for proportion then we have to find the sample size for the…

Q: Educational Television In a random sample of 210 people, 148  said that they watched educational…

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Q: A Pew Poll conducted in 2013 surveyed a random sample of 200 adult Americans and 36 of them said…

A: According to the given information, we have Total number of adults = 200 36 of them said that they…

Q: Educational Television In a random sample of 195 people, 160 said that they watched educational…

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

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Q: a. Estimate the true proportion P2 of all the people who are willing to go on the Kumepr3ko…

A: Provided information is,  Poll was conducted on twitter to know the stands of the youth on the…

Q: ch. The "confidence interval" lying between +1 SEM and -1 SEM would give us a “confidence level"…

A: The 68-95-99.7% (Empirical) Rule: For a normal distribution, the empirical rule (68-95-99.7% Rule)…

Q: For each confidence interval procedure, provide the confidence level. (Round the answers to the…

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Q: What percentage of hospitals provide at least some charity care? Based on a random sample of 10…

A: Solution: a. Let X be the percentage of hospitals provide at least some charity care. From the given…

Q: Educational Television In a random sample of 205 people, 14 said that they watched educational…

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Q: A sample of n = 200 college students are asked if they believe in extraterrestrial life and 120 of…

A: Given information- Confidence level, c = 95% Sample size, n = 200 No. of students who believe in…

Q: According to recent data by the American Marketing​ Association, 76.5​%of people in the​ 18-24 age…

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Q: In a random sample of 200 people, 154 said that they watched educational television. Find the 90%…

A: It is given that in a random sample of 200 people, 154 said that they watched educational…

Q: Use the given confidence interval to find the point estimate ?̂p^.   0.14<?<0.84

A: Use the given confidence interval to find the point estimate ?̂p^.   0.14&lt;?&lt;0.84 The lower…

Q: In Interval estimation for the population mean, which of the following increases the width of the…

A: Interval estimation for the population mean and their width is defined as,

Q: We would like to create a confidence interval for the mean. Which of the following would produce the…

A: Margin of error = Width/2

Q: The sample proportion pˆ for the confidence interval 0.138 < p < 0.182 is

A: Given confidence interval is 0.138&lt;p&lt;0.182Upper Limit = 0.182Lower Limit = 0.138

Q: Use the given data to construct a 99% confidence interval for the population proportion p. x= 50,…

A: We have given that,  Sample size (n) = 70 and favorable cases (x)=50  Then,  We will find 99%…

Q: Express the confidence interval in the form of p±E. 13) 0.203<p<1.423 13)

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.