98% of confidence; the sample size is 800, of which 25% are successes. find the margin of error
Q: a recent poll, 550 people were asked if they liked dogs, and 44% said they did. Find the margin of…
A: We have given that Sample size n= 550 Sample proportion p^= 0.44
Q: Use the formula in this example to determine the sample size, n. The estimated prevalence is 16%,…
A: Given that p=16%=0.16 , Margin of error=E=5%=0.05 91% confidence level
Q: Use the formula in this example to determine the sample size, n. The estimated prevalence is 16%,…
A: given data p^ = 0.1691% ci E = 0.04n = ?
Q: In a recent poll, 410 people were asked if they liked dogs, and 85% said they did. Find the margin…
A: Given that, p^=0.85n=410 Critical value: By using the z-tables, the critical value at 1% level of…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: In this question, It has been given that Margin of error = 0.05 and level of significance = 0.005.…
Q: In a recent poll, 450 people were asked if they liked dogs, and 48% said they did. Find the margin…
A: Total number of people = 450 Given that in a recent poll, 450 people were asked if they liked dogs,…
Q: Find the n amount, given that with a 95 percent confidence the error is by three percentage points…
A: Formula : Margin of error: ME=Zα/2 * √p̂(1-p̂)/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: In a recent poll, 300 people were asked if they liked dogs, and 89% said they did. Find the margin…
A: Solution: From the given information, p-hat=0.89 and n=300.
Q: In a recent poll, 260 people were asked if they liked dogs, and 13% said they did. Find the margin…
A:
Q: Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use…
A:
Q: In a recent poll, 120 people were asked if they liked dogs, and 29% said they did. Find the margin…
A:
Q: A new fertilizer was applied to the soil of 199 bean plants. 48% showed increased growth. Find the…
A: Margin of error for proportion is given by, MOE= z*√pq/n Where P Is proportion and Q= 1-P n is…
Q: Use the sample data and confidence level given below to complete parts (b) A research institute…
A: Margin of error can be calculated as shown below.
Q: Solve for the sample size: Determine the sample size necessary to estimate the proportion of people…
A: The random variable time spent on shopping follows normal distribution. We have to find the sample…
Q: A company wants to know the proportion of consumers willing to buy their product. How many people…
A: Given that ME=margin of error=1.5%=0.015z=critical value off 90% confidence…
Q: In a recent poll, 500 people were asked if they liked dogs, and 54% said they did. Find the margin…
A: Here we need to find the Margin of error corresponding to 95% confidence level.
Q: A new fertilizer was applied to the soil of 222 bean plants. 28% showed increased growth. Find the…
A: Given Information: Sample Size, n =222Sample Proportion, p^=28% =0.28 To find out the margin of…
Q: A poll of 2657 U.S. adults found that 86% regularly used Facebook as a news source. Find the margin…
A: Given that, n = 2657 Point estimate = sample proportion = = 0.86 1 - = 1 - 0.86 = 0.14
Q: A poll of 2977 U.S. adults found that 28% regularly used Facebook as a news source. Find the margin…
A: Solution: Given information: n = 2977 Sample size p^= 0.28 Sample proportion.
Q: In a recent poll, 600 people were asked if they liked dogs, and 58% said they did. Find the margin…
A:
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: You want to estimate the percentage of small incorporated businesses that are owned by women. A…
A: The random variable percentage of small incorporated businesses follows binomial distribution. The…
Q: In a recent poll, 300 people were asked if they liked dogs, and 73% said they did. Find the margin…
A:
Q: n a recent poll, 330 people were asked if they liked dogs, and 30% said they did. Find the margin of…
A: given data, n=330p=0.30CI=0.99α=1-0.99=0.01ME=?
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: A sample of size 50 was drawn from a population that is not necessarily normally distributed. The…
A:
Q: Use the confidence interval to find the margin of error and the sample mean. (0.676,0.800)
A: The margin of error is the most common term which we use in a confidence interval. It is the degree…
Q: In a recent poll, 260 people were asked if they liked dogs, and 32% said they did. Find the margin…
A: Find z-critical value:…
Q: In a recent poll, 250 people were asked if they liked dogs, and 21% said they did. Find the margin…
A: Sample size=n=250P=21%=0.2195% of confidence interval is
Q: In each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…
A: Formula for the margin of error is given by
Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?
A:
Q: A new fertilizer was applied to the soil of 151 bean plants. 72% showed increased growth. Find the…
A: The known values are, P^=0.72, n=151. Using Standard normal table, the critical value for two-tailed…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Here,…
Q: We are collecting data on the patients that have been vaccinated for the coronavirus, and the…
A: Given :The initial data shows a 90% success. We want the margin of error to be no more than 3%. We…
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 each of Exercises, explain the effect on the margin of error and hence the effect on the accuracy…
A: Effect on margin of error:If the sample size decreases, then the standard error of statistic…
Q: A new fertilizer was applied to the soil of 123 bean plants. 85% showed increased growth. Find the…
A: Find z-critical value: For the two-tail test, Area on each tail. Area to the left of the normal…
Q: se the formula in this example to determine the sample size, n. The estimated prevalence is 19%,…
A: Given that,
98% of confidence; the
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- Cory is serving coffee in a large reception with many guests. There are two kinds of coffee: regular anddecaf. So far, he has served 71 cups of regular and 49 cups of decaf. Find the margin of error at 90% confidence.A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 9% margin of error at a 90% confidence level, what size of sample is needed?A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=935 and x=561 who said "yes." Use a 95% confidence level.
- Use the confidence interval to find the margin of error and the sample mean. (0.346,0.450) The margin of error is The sample mean is 9 五 0 SF10A poll of 2368 U.S. adults found that 40% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 99% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % The more error we allow, the less precise our estimate. Therefore, as the confidence level increases, the precision of our…A survey agency has asked students to speculate on whether hot dog is a sandwich or not. Assume half of the survey participants believe that hot dog is a sandwich, while the other half believe it is not. How large a sample would the agency need to select to be 93% confident that the margin of error equals 0.05?
- In a poll of 650 likely voters, 338 indicated that they planned to vote for a particular candidate. Find the sample proportion. (Write answer as a decimal) Approximate the margin of error for a 95% confidence level. (Write answer as a decimal) ± Find the 95% confidence interval. (Write answers as a percentage) ( % , % )A new fertilizer was applied to the soil of 239 bean plants. 11% showed increased growth. Find the margin of error and 95% confidence interval for the percentage of all bean plants which show increased growth after application of the fertilizer. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval:A poll of 2338 U.S. adults found that 71% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to %
- In a recent poll, 500 people were asked if they liked dogs, and 72% said they did. Find the margin of error of this poll, at the 95% confidence level. Give your answer to three decimalsNatalia estimates that she wins a board game 72% of the time. How large of a random sample is required to obtain a margin of error of at most 0.06 with 95% confidence? Find the z-table here. 152 216 267 372In a recent poll, 100 people were asked if they liked dogs, and 90% said they did. Find the margin of error of this poll, at the 95% confidence level.Give your answer to three decimals