A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are optimistic about the economy or not. There were 612 who said Yes. 1. Use 95% confidence level to estimate the population proportions. What is the margin of error E? a. 1.54% b. 1.53% c. 0.0155 d. none of the above 2. Use 95% confidence level to estimate the population proportions. What is the upper limit? a. 60.12% b. 65.42% c. 61.25% d. 64.22%

Q: Use the sample data and confidence level given below to complete parts  (a)    A research institute…

A: It is given that x is 587 and n is 912.

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Option A is correct

Q: Find the sample size need to find the Population Mean if the margin of error is $105, the confidence…

A: Solution: From the given information, confidence level is 0.95, σ=315 and E=105.

Q: d the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a…

A: Margin of error E=4%=0.04C.I=95%=0.95

Q: You are a manager for a local convenience store. You want to determine what proportion of your…

A: We have given that,  Margin of error (E) = 5.50% and confidence level = 90% Then,  We will find the…

Q: Suppose that you wanted to determine a confidence interval for the number of people who will get the…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: A poll reported that only 408 out of a total of 1549 adults in a particular region said they had a…

A: (a) Obtain the 95% confidence interval for the proportion that express a great deal or quite a lot…

Q: Use the sample data and confidence level given below to complete parts  (c).   A research institute…

A: It is given that, the number of respondents said yes (x) is 587 and the sample size (n) is 912.  The…

Q: Construct a 90% confidence interval to estimate the population mean using the accompanying data.…

A: Given that  Sample mean (x¯) = 85 Population standard deviation (σ) = 20 Sample size (n) = 16…

Q: In a survey of 2304 ​adults, 746 say they believe in UFOs.   Construct a 95% confidence interval for…

A: Solution: Let X be the number of adults who believe in UFOs and n be the sample number of adults.…

Q: In a survey of 2263 adults, 742 say they believe in UFOS. Construct a 95% confidence interval for…

A:

Q: 5. Attending sporting events is a popular source of entertainment. When 1000 people were surveyed,…

A: Given that 1000 people were surveyed. Therefore the sample size is  n=1000 After survey it is found…

Q: pretty sure is in your interval? 1. 90% of the sample data. II. 90% of all sample proportions. III.…

A: Construct 90% Confidence interval for population proportion p

Q: 3. In a random sample of 500 teenagers 12 to 17 years old, it was found that 330 have regular access…

A: Given problem is :

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A:

Q: A sociologist plans to conduct a survey to estimate the percentage of adults who believe in…

A: Given thatMargin of error (E) = 4% = 0.04Significance level (α) = 1 - 0.99 = 0.01

Q: Suppose you decide that you want to construct a 93% confidence interval. Which one of the following…

A: Given : confidence level, c = 93 %

Q: In a survey of 3352 adults, 1435 say they have started paying bills online in the last year.…

A: From the provided information, Sample size (n) = 3352 From which 1435 say they have started paying…

Q: Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a…

A: Step 1: Given informationConfidence level, c = 0.90Margin of error, E = 0.05 Step 2: Part (a)The…

Q: 14. Direct Mail A survey shows that 51% of adults prefer to receive advertisements through the mail.…

A: Given percent of adults prefer to receive advertisements through the mail=51%Margin of error(E)=5.2%

Q: 1. How is the expected length of a confidence interval related to the margin of error?

A: here use basic of confidence interval

Q: Use the sample data and confidence level given below to complete parts ( a ) through ( d ) . A…

A: In the given pool  and  who said "yes".The confidence level is 95%.

Q: You're considering going to graduate school, and you would like to know how many people would…

A: From the provided information Sample size (n) = 29, People who recommend x = 9 The sample proportion…

Q: Find the margin of error for the given confidence level.

A: Margin of error :  In a confidence interval, the range of values above and below the sample…

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

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: Find the indicated margin of error. In a survey of 1600 T.V. viewers, 50% said they watch network…

A: We have given that,  Sample size (n) = 16000, confidence interva (C.I) = 95% and estimate population…

Q: Use the sample data and confidence level given below to complete parts (a) through​ (d).   A…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: In a survey of 2587 adults in a recent​ year, 1241 say they have made a New​ Year's resolution.…

A: From the provided information Sample size (n) = 2587 1241 say they have made a New​ Year's…

Q: Find the sample size of American adults you would need to predict the results of an election with a…

A: Given thatMargin of error (E) = 0.02 Confidence level (c) = 90% = 0.90Significance level (α) = 1 -…

Q: What management interpretation would you give for a 95% confidence interval calculated for the mean?…

A: The confidence interval is the measure with with we try to get the interval on the population…

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

A: We need to construct the 95% confidence interval for the population proportion. We have been…

Q: city. Construct a 99% confidence interval estimate of the mean amount of mercury in the population.…

A: From the provided information, Sample size (n) = 7 Confidence level = 99% Level of significance = 1…

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll,…

A:

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

A: Given,n=130X=69p^=Xnp^=69130=0.5311-p^=1-0.531=0.469α=1-0.99=0.01α2=0.005Z0.005=2.576     (from…

Q: Suppose someone wanted an 75%-confidence interval. What value of z should they use? Choose the…

A: Level of significance ɑ=0.25

Q: A 95% confidence interval for the population proportion is (☐☐ ). (Round to three decimal places as…

A: Let p be the population proportion of the adults who believe in UFOs.Given that,Number ofadults No.…

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: A national health organization says that 30% of teenagers have tried smoking cigarettes. A health…

A: given data N =3500n = 280x = 56claim : p = 0.30

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: According to the given information in this question  There are more than three subparts according to…

Q: 6. Explain what this confidence interval means to your boss, who has never taken a statistics class.…

A: What is confidence interval and explain it to non statistics person.

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Use the table to get the answer         b.       For the variable EDUC                      i.…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Use the sample data and confidence level given below to complete. A research institute poll asked…

A:

Q: In a survey of 3089 adults aged 57 through 85 years, it was found that 88.5% of them used at least…

A: