A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD) in their county. They are using 95% confidence level and the CDC national estimate that 1 in 68 ≈ 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 2%? Round up to the nearest integer

Q: Suppose the NCES would like to re-do their study. If they want a 95% confidence interval with a…

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Q: Find the margin of error at a 90% confidence level.

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Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

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

Q: find the sample size needed to estimate the percentage of democrats who have tattoos. Use a 0.05…

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Q: In a survey of 2274 adults, 749 say they believe in UFOs. Construct a 99% confidence interval for…

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Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: It is given that Sample size n = 250 Number of students receiving scholarship, X = 70 The critical…

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: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

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

Q: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: For the same sample proportion and sample size, what happens to the width of a confidence interval…

A: Solution-: For the same sample proportion and sample size, what happens to the width of a confidence…

Q: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: In a survey of 4008 ​adults, 728 oppose allowing transgender students to use the bathrooms of the…

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Q: In a survey of 4052 ​adults, 723 oppose allowing transgender students to use the bathrooms of the…

A: It is given that x = 723 and n= 4,052.

Q: If n=41n=41, ¯xx¯=36, and s=9s=9, find the margin of error for a 80% confidence level.

A: Answer - Given, Sample size n = 41,    x  = 36    and s = 9               80% confidence interval…

Q: Suppose you want to construct a confidence interval with a margin of error of 0.03 (3%). Find the…

A: The formula for calculating sample size is, n = z2*p^(1-p^)MOE2 Where, z is the z score (default…

Q: A department chair wanted to know whose students performed better on a common pass/fail final exam:…

A: p1 :  proportion of students passed in smith's  class p2 :  proportion of students passed in Jones's…

Q: A company wants to know what proportion of their customers plan to repurchase their product in the…

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Q: In a survey of 1037 US adults ages 65 and over, 643 were concerned about getting the flu. A 99%…

A: Given,n=1037x=643p^=xnp^=6431037=0.6201-p^=1-0.620=0.380α=1-0.99=0.01α2=0.005Z0.005=2.58    (from…

Q: A study at Harvard found that 44% of their students binge drink. You are at Princeton doing a…

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Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

Q: According the the U.S. Census bureau, the percentage of Santa Ana residents living in poverty is…

A: Given: p^1=0.177p^2=0.133n1=1200n2=1500

Q: A Pew Internet poll asked 4272 U.S. adults about their use of smart watches and fitness trackers. A…

A: Given,n=4272X=897

Q: n a survey of 4026 ​adults, 708 oppose allowing transgender students to use the bathrooms of the…

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Q: In the state of Missouri, there are 229 eight year olds diagnosed with ASD out of 18,450 eight year…

A: x1 = 229 n1 =18450 x2 = 47 n2 = 2202 Confidence  level  95% p1 = x1/n1 = 229 / 18450 = 0.01241 p2 =…

Q: In 2010, the proportion of Texans without health insurance was 0.11. To update this information a…

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Q: If subject 101is 71 years old. Divide the age by 10 and put a % on it, that is your desire margin of…

A: Solution:The formula for the sample size is as follows:

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

A: Given , n = 1008 x = 598

Q: igh school soccer league there are a total of 256 players.

A: Given that Total players in high school soccer league (n) = 256 players The mean height of the…

Q: It is believed that slightly over 50% of Americans own pets. A 95% confidence interval for the…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: In a survey of 3983 ​adults, 747 oppose allowing transgender students to use the bathrooms of the…

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Q: A sample of 1,000 employees in an international company was taken to estimate the average…

A: Confidence interval of mean is given by, (X bar + - Z* sigma/√n) Where X bar is mean and sigma is…

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

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Q: What are two ways to get a narrower confidence interval for a proportion?

A: Two ways to get a narrower confidence interval for a proportion are:

Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

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Q: In a statistics course, the course grade is computed based on midterm exam, Final exam, term…

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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: How large a sample is needed to estimate the true proportion of these children getting adequate…

A: It is given that Proportion p = 0.45 Margin of error E = 0.025 Level of confidence = 0.99 The…

Q: We plan to sample parents in order to construct a 99% confidence interval for the proportion who…

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Q: earcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm…

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

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Q: Ve want to know how many people plan on buying a cell phone this year. Determine the sample size…

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Q: You are conducting a study to estimate the mean height of students in a university. The university…

A: To calculate the sample size required to estimate the mean height of students in the university with…