In a sample of 85 statistics students, 41 said that finding confidence intervals for population proportions was their favorite topic. Give the 99% confidence interval estimate of the population proportion of statistics students whose favorite topic is finding confidence intervals for p.

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: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Given data,     P=58%=0.58     E=7%=0.07     z-value at 95% confidence is  zc =1.98     n=?

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

A: Sample size:The minimum sample size for a desired confidence level, α with a given margin of error,…

Q: Find the 95% confidence interval for the mean difference of the tests, and explain it.

A: Test - 1 (X) Test-2 (Y) (x-xbar) (x-xbar)^2 (y-ybar) (y-ybar)^2 1.2 1.4 -0.31111 0.09679 -0.24444…

Q: 2. A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: We have given thatn = 1200x = 200p̂ = x/n = 200/1200 = 0.167Significance level (α) = 1 - 0.95 = 0.05

Q: In a survey of 2344 ​adults, 715 say they believe in

A: Given that there are 2344 adults and 715 say they believe in UFOs. Consider the sample proportion,…

Q: In a recent poll, 260 people were asked if they liked dogs, and 13% said they did. Find the margin…

A:

Q: In a recent poll, 430 people were asked if they liked dogs, and 41% said they did. Find the margin…

A: It is given that the value of n is 430, p hat is 0.41 and the confidence level is 0.99.

Q: We would like to know: "What percentage of college students drink alcohol every day?" In a random…

A: Given that, N=500 X=75

Q: If a 90% confidence interval for the mean is found to be (1.25,4.75) using a sample of n=100, find…

A:

Q: We would like to know: "What percentage of college students read the college newspaper every day?"…

A: It is provided that there is random sample of 500 college students in which 231 students said that…

Q: In a study of 120 randomly selected families, 50 said they streamed their television content. Find…

A:

Q: The Graduate Schools take a random sample of recent MS graduates (n=135) and finds that 12 of these…

A: Givenn=135x=12confidence interval = 90%p^=xn=12135=0.0889α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449…

Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

A: The random variable cyber bullied follows normal distribution. The sample size is 14795. The number…

Q: In a recent poll, 560 people were asked if they liked dogs, and 22% said they did. Find the margin…

A: For 95% confidence intervalα=1-CI=1-0.95=0.05So, zα2=z0.052=z0.025=1.96

Q: In a survey of 50,00 people, 80% indicated that they listened to their favorite radio station…

A: Hern= 5000 P^ = 0.80 We have to construct 95% ci for p

Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

A: We have given that,  Favorable cases (X) = 2219 and sample size   (n) = 14795. Then,  We will find…

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

A:

Q: Find a 95% confidence interval for the proportion of renters.

A: It is given that  Favourable cases, X = 360 Sample size, n = 600 Confidence interval = 95%

Q: In a recent poll, 150 people were asked if they liked dogs, and 55% said they did. Find the margin…

A:

Q: In a recent poll, 600 people were asked if they liked dogs, and 58% said they did. Find the margin…

A:

Q: If a student provided 90% confidence intervals in all ten questions, how many points would we expect…

A: In the given analysis, we have 10 questions and their correct answers. 10 sample responses from 10…

Q: In a survey of 7100 t.v views, 40% said they watch network news programs. Find the margin of error…

A: Solution: From the given information, p-hat=0.40 and n=7100. The confidence level is 0.95.

Q: In a recent poll, 240 people were asked if they liked dogs, and 32% said they did. Find the margin…

A: Find z-critical value:…

Q: In a recent polI, 200 people were asked if they liked dogs, and 15% said they did. Find the margin…

A: From the provided information, Sample size (n) = 200 15% people said they like dogs that is p̂ =…

Q: In a recent poll, 300 people were asked if they liked dogs, and 73% said they did. Find the margin…

A:

Q: In a recent poll, 260 people were asked if they liked dogs, and 67% said they did. Find the margin…

A: Given: p = 67%=0.67 n= 260 The value of z at a 90% confidence level is 1.645, which can be found by…

Q: It was observed that 30 of the 100 randomly selected students smoked. Find the confidence interval…

A: It is given that, 30 out of 100 randomly selected students smoked i.e. proportion of the student who…

Q: 9. A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

A:

Q: In a random sample of 145 students, we find that 53% have attended a baseball game at some point in…

A: Given,sample size (n)=145sample proportion(p^)=0.53α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: Out of 500 people sampled, 455 had kids. The best point estimate for p is . The margin of error…

A:

Q: If n=110 and ˆpp^ (p-hat) =0.71, find the margin of error at a 90% confidence level Give your…

A: Sample size n = 110 Sample proportion p^ = 0.71 Confidence level = 90% Formula Used: Margin of error…

Q: A random survey of 36 airline passengers indicates that twelve have never flown before. Find a 95%…

A: We have given that,  Sample size (n) = 36 and favorable cases         (X) = 12 Then,  We Will find…

Q: If n=580 and ˆpp^ (p-hat) =0.59, find the margin of error at a 95% confidence level Give your…

A: Obtain the margin of error for the 95% confidence interval. The margin of error for the 95%…

Q: In a survey conducted by CNN, 130 of the 250 people that were randomly surveyed have a savings…

A: Given data, n=250 x=130 Sample proportion p=x/n =130/250=0.52 z-value at 90% confidence is Zc=1.645

Q: The 95% confidence interval for the mean contains the sample mean with 95% certainty.TrueFalse

A: The confidence interval provides us a different range at different levels of significance. Since,…

Q: Find a 90% confidence interval for the true proportion of people that eat frog legs, if in a sample…

A: Given, n = 732 p = 0.65 1 - α = 0.90α = 0.1α2 = 0.05   To find, 90% confidence interval for the true…

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given : n = 1000 X = 600

Q: A 95% confidence interval is constructed in order to estimate the proportion of adults who own an…

A:

Q: A random sample of accountants were asked whether they double-check their calculations on a tax…

A: Here the sample proportion is given by, p^ Therefore α level confidence interval is given by, p^ -…

Q: In a recent poll, 110 people were asked if they liked dogs, and 40% said they did. Find the margin…

A: For 99% confidence intervalα=1-CI=1-0.99=0.01So, zα2=z0.012=z0.005=2.576

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given : Sample Size, n = 316 Number of successes, x = 112 confidence level,c=0.99…

Q: At one large college, 660 out of the 1500 students surveyed said they plan to take another science…

A: Given that,   x=660,n=1500 The sample proportion is, Critical values: By using the standard normal…

Q: If n=330 and p (p-hat) -0.27, find the margin of error at a 90% confidence level Give your answer to…

A:

Q: In a recent poll, 410 people were asked if they liked dogs, and 44% said they did. Find the margin…

A: n = 410 p^=0.44 Confidence interval = 95%

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

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

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: (a) From the Standard Normal Table, the z value for 99% level is 2.576. The sample proportion is,…

Q: Suppose you compute a confidence interval with a sample size of 37. What will happen to the…

A: If the sample size increases from 37 to 70 then, the margin of error of the confidence interval…

Q: confidence interval for the true proportion

A: We have to find out the confidence interval for the true proportion.

Q: A survey found that out of 800 workers, 150 said they were interrupted by frank phone calls. Find…

A: Given,n=800x=150p^=xnp^=150800=0.18751-p^=1-0.1875=0.8125α=1-0.95=0.05α2=0.025Z0.025=1.96