In a survey about supernatural experiences, 722 out of 4013 randomly selected adult Americans reported that they had seen or been with a ghost (USA Today 2010). f) Will your interval get larger or smaller if you increase your confidence level to 98%. g) Will your interval get larger or smaller if you increase the number surveyed to 6000?

Q: A federal report indicated that 22% of children ages 2 to 5 years had a good diet, an increase over…

A:

Q: In a recent poll, 360 people were asked if they liked dogs, and 92% said they did. Find the margin…

A:

Q: Construct the 99% confidence interval estimate of the population proportion p if the sample size is…

A: Obtain the 99% confidence interval estimate of the population proportion. The 99% confidence…

Q: The estimated prevalence is 25%, and the desired confidence level is 95% with a margin of error of…

A: Given: p=25%=0.25α=0.05ME=9%=0.09

Q: If n=500 and p^ (p-hat) =0.13, find the margin of error at a 90% confidence level Give your answer…

A: Find z-critical value: For the two-tail test, Area on each tail. Area to the left of the normal…

Q: If n=28, ¯xx¯(x-bar)=48, and s=2, find the margin of error at a 90% confidence level Give your…

A: Margin of error = E E = tCriticalsn

Q: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

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: Out of 500 people sampled, 390 had kids. Based on this, construct a 99% confidence interval for the…

A: Find z-critical value: For the two-tail test, Area on each tail. Area to the left of the normal…

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A:

Q: If n=20, ¯xx¯(x-bar)=44, and s=9, find the margin of error at a 98% confidence level Give your…

A: In the question, n=20 and s=9 are given and the margin of error at a 98% confidence level is asked…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Solution

Q: A magazine article conducted a survey of 1000 people in Washington State and found that 26% of the…

A:

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: Solution: Given information: n= 746 Sample size  x = 56 Successes  p^=xn=56746= 0.0751    Sample…

Q: In a survey of 500 students, 335 indicated that they are living near the university campus, that is,…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: If n=30, ¯xx¯(x-bar)=49, and s=4, find the margin of error at a 99% confidence level Give your…

A: Given,n=30x¯=49s=4degrees of freedom(df)=n-1df=30-1=29α=1-0.99=0.01α2=0.005t0.005(29)=2.756…

Q: If n=12, ¯xx¯(x-bar)=35, and s=5, find the margin of error at a 99% confidence level Give your…

A: Sample size = 12 Sample mean = 35 Sample standard deviation = 5

Q: In a​ poll, 6969​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Obtain the value of the minimum number of surveyed people. The value of the minimum number of…

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: From the given question,69% of the people polled answered yes to the question.That means,…

Q: If n=31, ¯xx¯(x-bar)=31, and s=3, find the margin of error at a 90% confidence level Give your…

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

Q: Out of 300 people sampled, 192 had kids. The best point estimate for p is The margin of error for a…

A: Given information- Confidence level, c = 0.99 So, significance level (α) = 0.01 Sample size, n = 300…

Q: A psychologist is interested in constructing a 90% confidence interval for the proportion of people…

A: Given: n = sample size = 748 x = Number of people who accept the theory that a person's spirit is no…

Q: 2. A researcher wants to estimate the daily expenses of college students. He wants a 95% confidence…

A: We have given that,  Population standard deviation (σ) = 99.50, margin of error (E) = 45 and…

Q: n a recent poll, 500 people were asked if they liked dogs, and 92% said they did. Find the margin of…

A: Given data, n=500 p=92%=0.92 Z value at 90% confidence is Zc=1.645 margin of error(E)=?

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

A: alpha = 0.05

Q: Out of 500 people sampled, 120 had kids. Based on this, construct a 99% confidence interval for the…

A:

Q: Determine tc for n = 15 and a confidence level of 99%.

A: From the given information, Sample size (n) =15, Confidence level (1-α)= 0.99 Thus, the t-critical…

Q: In a recent poll, 370 people were asked if they liked dogs, and 86% said they did. Find the Margin…

A: Given: n= 370 At 99.0 % confidence level , z score= 2.576 Need to find confidence interval for…

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

A:

Q: In a recent poll, 530 people were asked if they liked dogs, and 95% said they did. Find the margin…

A: Given, n=530 p=0.95 Confidence level = 0.95 Critical value for 95% confidence level is 1.96.

Q: In a recent poll, 430 people were asked if they liked dogs, and 54% said they did. Find the margin…

A: In a recent poll, 430 people were asked if they liked dogs, and 54% said they did. Find the margin…

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 same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: No. of adult respondents=1523 No. of teen respondents=501 Percentage of adults responding yes to…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: From the given information, The percentage of chocolate pie is 14%. There are 500 respondents.…

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

A: Let p denote the proportion of people answered yes to the question. Let E denote the margin of…

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: Calculate a 95% confidence interval: Of the 998 respondents questioned, 246 identified themselves…

A: Given Data: x=246 n=998   p^=xn=246998=0.2465

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite…

A: It is given that the sample size is 500.

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Given that among 500 respondent , 11% chose chocolate pie and the margin of error was given as 4…

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A: Solution: The results from a poll of 2010 adults who are asked to identify their favorite pie

Q: If n=24, ¯xx¯(x-bar)=31, and s=7, find the margin of error at a 99% confidence level Give your…

A: Obtain the margin of error for a 99% confidence interval. The margin of error for a 99% confidence…

Q: After surveying 625 potential voters polled, you find out that 325 support candidate X and 300…

A: The sample proportion confidence interval is, p^±Zp^(1-p^)nwhere, p^ = the sample proportion…

Q: If n=32, ¯xx¯(x-bar)=49, and s=10, find the margin of error at a 95% confidence level

A:

Q: Given that the confidence level is x %, give an expression in terms of x for a.

A: According to the provided information, the confidence level is x %

Q: If 390 people were asked if they liked dogs, and 82% said they did What is the margin of error of…

A: The sample size is 390, proportion is 0.82. Computation of critical value:…

Q: If n=23, x(x-bar)=47, and s=3, find the margin of error at a 98% confidence level Give your answer…

A: Margin error is the difference between the estimated value and the original value. Here the critical…

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A:

Q: If n=10, ¯xx¯(x-bar)=44, and s=8, find the margin of error at a 80% confidence level

A:

Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…

A: We have to find out given answes ..

Q: If n=25, ¯xx¯(x-bar)=47, and s=3, find the margin of error at a 80% confidence level Give your…

A: Given:  The size of the sample is n=25. The sample mean is given as:…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.