A psychiatrist is interested in finding a 95% confidence interval for the tics per hour exhibited by children with Tourette syndrome. The data below show the tics in an observed hour for 15 randomly selected children with Tourette syndrome. Round answers to 3 decimal places where possible.

Q: Kim wants to determine a 99 percent confidence interval for the true proportion of high school…

A: From the given information, Margin error (E) = 0.03 Assume sample proportion = 0.5   The objective…

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: All else being equal, a 90% confidence interval will be longer than a 95% confidence interval. True…

A:

Q: following is a 95% confidence interval for the proportion of all students at the school who ate…

A:

Q: Out of 100 people sampled, 16 have tried marijuana. Based on this, construct a 95% confidence…

A: Obtain the 95% confidence interval for the true population proportion of people who have tried…

Q: The 95 % confidence interval for the mean lead content per litre of waste water produced by her…

A: It is given that Sample size n = 500 Sample mean M = 641 Population SD = 20 The critical value of Z…

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: Solution: It is given that the planning value for the population proportion is 0.25. The confidence…

Q: The County Development Agency does a survey of all the mobile home manufacturers in Clarion County…

A: X̄ = $13,550, σ = $2,000, n = 25,

Q: A New York Times article reported that a survey conducted in 2014 included 36,000 ​adults, with…

A: A margin of error could be a statistical measurement that accounts for the difference between actual…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large sample should…

A: Given information Error = 0.09 Population proportion = 0.25 Confidence level = 0.95

Q: Kim wants to determine a 80 % confidence interval for the true proportion ? of high school students…

A:

Q: If n-28, 2(x-bar)-38, and s-13, construct a confidence interval at a 98% confidence level. Assume…

A: Given : Sample Size, n = 28 Sample Mean, x̄ = 38 sample standard…

Q: Everything else being equal, a population with a higher mean yields a confidence interval that is…

A: As the formula for confidence interval is: CI=X±Zsn Where: X = Mean of the data's Z = Z-value…

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: The following information has been provided: p^=0.51E=0.03 The level of significance is : α=1-0.94…

Q: In one city, 59.6% of the 1500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given, Sample size=n=1500 p^=0.596 α=0.05

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that; Sample size (n) = 120  X = 88  At 90% confidence interval .

Q: A random sample of 560 serviced tables at a restaurant reveals that 20% of them offer tips to the…

A:

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: 1. A Pew Poll conducted in 2013 surveyed a random sample of 200 adult Americans and 36 of them said…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: Find the confidence level and α for a. an 85% confidence interval. b. a 95% confidence interval.

A:

Q: A sample of 1000 adults showed that 31% of them are smokers. The 90% confidence interval for the…

A: Solution: From the given information, n=1000, p=0.31 and the confidence level is 0.90. Then, the…

Q: The number of television sets coming off a production line each day is known to have a standard…

A:

Q: The value of t for 20 degrees of freedom and a 98% confidence interval is: -2.528 O 1.328 O 2.528 O…

A: The degrees of freedom is df=n-1=20 The confidence interval is 98%. The level of significance is…

Q: . A survey of folk music fans yields this 95% confidence interval estimate of the proportion of fans…

A: The 95% confidence interval for proportion of fans who love music of David Wilcox is 0.74 to 0.86

Q: As the confidence gets larger, what happens to the width of the confidence interval? Wider / Larger…

A:

Q: A social science research project has a level set at .05. What is the probability of the researchers…

A: alpha = 0.05

Q: If n = 13, T=30, and s = 3, construct a confidence interval at a 99% confidence level. Give your…

A:

Q: In the Laboratory Activity, we used 90% confidence interval instead of 100%, why is this so? Why not…

A: Confidence Interval A confidence interval (CI) is a set of numbers that assess the validity of the…

Q: Cora wants to determine a 99 percent confidence interval for the true proportion p of high school…

A: Given data: Margin of error (E) = 0.01 Confidence level  = 99 % To find : The required sample size…

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: We have to find sample size..

Q: (d) Develop a 95% confidence interval for this population proportion. (Round your answer to four…

A: The point estimate of proportion of respondent who lack confidence they will be able to afford…

Q: Cora wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

Q: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: A survey of 800 women shoppers found that 17% of them shop on impulse What is the 98% confidence…

A:

Q: 4) Out of the 440 people surveyed, a 110 said they listen to Spotify at least one a month. With the…

A:

Q: What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c.…

A: Confidence Level = 90 Significance Level = α = (100-90)% = 0.1 Critical value = z* = 1.65   […

Q: In the previous example, you learned that the 95% confidence interval for the true proportion of all…

A: Calculate the point estimate and margin of error used to create this confidence interval.

Q: Find the confidence level and a for an 88% confidence interval.

A: Here use confidence level and significance level as alternative of each other

Q: The t-value (t - score) that would be used to construct a 99% confidence interval given a sample…

A:

Q: If appropriate, construct a 99.9% confidence interval for the ounce milkshakes sold at fast-food…

A: Data  504,450,399,613,608,700,472,510,642,591,375,580

Q: A health professional takes the temperatures of 5 patients:   99.8    98.3    96.9    98.0    98.3…

A: We have given that  A health professional takes the temperatures of 5 patients: 99.8    98.3    96.9…

Q: Using your answers to parts (a) and (b), find a 95% confidence interval estimating the proportion of…

A: Here we need to construct a 95% confidence interval.

Q: Find the confidence level and α for a. a 90% confidence interval. b. a 99% confidence interval.

A:

Q: In a survey, the planning value for the population proportion is p* = 0.35. How large a sample…

A: Find z-critical value. Refer Standard normal table/Z-table OR use excel function…

Q: Thirty randomly selected students took the calculus final. If the sample mean was 95 and the…

A: The summary of statistics is, The degree of freedom is, Critical value: By using the t-tables, the…

Q: In a​ poll, 37​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Given information- Margin of error, E = 5% = 0.05 Confidence level, c = 96% We have given that 37​%…

Q: Researchers studied the mean egg length (in millimeters) for a bird population. After taking a…

A: