In a marketing survey, a random sample of 982 supermarket shoppers revealed that 262 always stock up on an item when they find that item at a real bargain price. What is the margin of error based on a 95% confidence interval?

Q: Problem 3. The Associated Press (October 9,2002) reported that in a survey of 4722 American…

A: The independent variable is American youngsters aged 6 to 19 years. The dependent variable is…

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: A recent study of a very large number of parents on cyberbullying showed that a 95% confidence…

A: Given data,For 95% CILower limit=0.1238Upper limit =0.2036Proportion (p)=?

Q: 3. A researcher wants to estimate the impact of alcohol during pregnancy on premature delivery.…

A: Given : p1:probability of premature delivaries=0.12p2:proportion of normal pregnancies…

Q: You are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A:

Q: In a survey, 28 people were asked how much they spent oh were roughly bell-shaped with a mean of $49…

A: Given Information: Sample size (n) = 28 Mean x¯= 49 Standard deviation s= 8 Confidence level = 80% =…

Q: You may need to use the appropriate appendix table technology to answer this question. A 95%…

A: Assume that μ is the population mean.

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: Consider a sample of 100 people and subsequently a confidence interval calculated from the sample.…

A: The formula for calculating confidence interval is as follow:

Q: In a marketing survey, a random sample of 728 women shoppers revealed that 630 remained loyal to…

A: The sample proportion is calculated as shown below:

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

A:

Q: If n=28, ¯x=46x¯=46, and s=7, find the margin of error at a 95% confidence level Give your answer…

A: Given,n=28x¯=46s=7degrees of freedom (df)=n-1=28-1=27α=1-0.95=0.05α2=0.025t0.025(27)=2.052   (from…

Q: You are looking into selling prices of Subaru Outback from a website where users report their…

A: Formula :

Q: You are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A:

Q: You are interested in constructing a 90% confidence interval for the proportion of all caterpillars…

A: Solution: a. Let X be the number of caterpillars that eventually become butterflies and n be the…

Q: You are interested in constructing a 90% confidence interval for the proportion of all caterpillars…

A: Given n=447 X=46 Confidence level at 90%=1.64

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

A:

Q: 1. A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are…

A: Here use confidence interval for population proportion

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

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

A: Given Information :  A researcher is interested in constructing a 99% confidence interval for the…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A:

Q: A. A sample of 400 diabetic patients was used in estimating the percentage of diabetics that are…

A: A)Givensample size(n)=400x=42sample proportion(p^)=xn=42400=0.105confidence level=95%

Q: Round your answers to two decimal places. A. With 90% confidence the proportion of all people who…

A: It is given that  Sample size , n = 800 Favourable cases, X = 382 Sample proportion, p^ = X/n  =…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A: It is given that sample size (n) is 354and x is 52.

Q: want to estimate the proportion of all college students who traveled during spring break. survey a…

A: Given that Sample size n =200 Favorable cases x =116 Sample proportion p^=x/n =116/200 =0.58

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

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

A: Confidence level = 99%

Q: You are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A: sample size(n)=365 x=42 confidence level=95% sample proportion(p^)=42365≅0.1151

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

A: It is given that the confidence levels are 0.80 and 0.99.

Q: Question 1 Out of 300 people sampled, 219 had kids. Based on this, construct a 99% confidence…

A: According to the given information, we have Total number of people sampled = 300 Out of 300 people…

Q: ou are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A: Given data,Number of Caterpillars n=390Number of Caterpillars become butterfly is x=48Construct a…

Q: If n=14, (x-bar)-33, and s=9, find the margin of error at a 98% confidence level Give your answer to…

A: We have given that, Sample mean (x̄) = 33, standard deviation (s)= 9 and sample size (n) = 14  Then,…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A: It is been asked to find a 99% confidence interval for the proportion of all caterpillars that…

Q: You want to estimate the proportion of current OSU students who were born outside of Ohio. You…

A: Given: n= 300 At 99.0 % confidence level , z score= 2.576 Need to find MARGIN OF ERROR for…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpillars…

A:

Q: The state of California has a mean annual rainfall of 22 inches, whereas the state of New York has a…

A: Given: For California: Mean,μ=22Std deviation,σ=4Sample size, n=30 For New York: Mean,μ=42Std…

Q: The concept of a confidence interval for a population proportion is similar, but the math is a…

A: We have given thatn = 240x = 48

Q: The Nielson television ratings used a sample of 2,000 homes to estimate the proportion of all homes…

A:

Q: You are interested in constructing a 90% confidence interval for the proportion of all caterpillars…

A: Confidence interval: The (1-α) % confidence interval for proportion p is given by,

Q: Need asap. A magazine article conducted a survey of 1000 people in Washington State and found that…

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

Q: 6. A sample of 15 students was used to estimate the performance of graduates of a certain college on…

A: Given : A sample of 15 student's was used to estimate the performance of graduates of a certain…