We want to estimate the proportion of vegetarian restaurants in a country. We observe 20 such restaurants out of 100 randomly selected ones. If we construct a 90% confidence interval for the proportion of vegetarian restaurants in that country, what will be the upper limit of the interval?

Q: From a random sample of 40 students, a 90% confidence interval for the mean weekly allowance is…

A:

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: For Males : The sample size , N1=70N_1 = 70 Those who said Yes ,  X1=55X_1 = 55X1​=55:…

Q: If the 95% confidence interval for a population mean from a certain sample is (-6.3, 4.5), then (а)…

A: Given that,95% C.I. for a population mean from a certain sample is (-6.3, 4.5)

Q: Suppose we know that a confidence interval is (27,35), with a margin of error of 4. Find the sample…

A:

Q: Find a 90% confidence interval for the population mean, if the sample size is 58, the sample mean is…

A:

Q: Suppose the desired confidence level is fixed, then what is the effect of a larger sample size on…

A:

Q: If a researcher found that the margin of error =0.9 and the sample mean from the study was 17.7,…

A: Given, A researcher found that the margin of error ME  = 0.9 and  The sample mean u = 17.7 Find the…

Q: suppose that we want a 95% confidence interval for π = proportion of defectives if we observe 4…

A: Given that, there are 4 defectives in 60 items tested. n=60 and x=4 Proportion of defective is given…

Q: What are the conditions for a confidence interval?

A: A confidence interval tells the possible range around the estimate and also how stable the estimate…

Q: What is the minimum required sample size to make a 97% confidence interval for a population…

A:

Q: Find the value of ta for a 99% confidence interval when sample size is 30 2

A: Note: Since you have asked multiple question, we will solve the first question for you as per…

Q: A researcher was interested in knowing how many people in the city supported a new tax. She sampled…

A:

Q: A students wants to estimate the proportion of professors who drive pickup trucks. She surveys 250…

A: Confidence interval is an inference process which gives the range of plausible values of population…

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: Solution: From the given information, n=200, p-hat is 0.30 and the confidence level is 0.90.

Q: If n = 250 and X = 200, construct a 99% confidence interval for the population proportion, p. Give…

A: As given, n = 250 and x = 200.  It is asked to construct a 99% confidence interval for the…

Q: A business student is interested in estimating the 99% confidence interval for the proportion of…

A: Here, confidence level is 0.99 and margin of error is 0.04.

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

A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.

Q: A health insurance firm wants to estimate the proportion of a population that would receive the flu…

A:

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: We have calculated a 95% confidence interval and would prefer for our next confidence interval to…

A: The next confidence interval can have a smaller margin of error by increasing the sample size. That…

Q: Identify the t-score for a 90% confidence interval if the sample size is 31. t =

A: c1=90%n=31α=1-0.90=0.10df=n-1=31-1=30

Q: Suppose we observed 15 successes in a random sample of 60 subjects. What is the 99% confidence…

A:

Q: Seventy-three percent of a sample of 1000 students drive a used car as opposed to a new car or no…

A: Given: Proportion  = 73 % Confidence level  = 80 %

Q: To construct a confidence interval, we have to make three assumptions. explain what are those…

A:

Q: if for some reason it was not possible to obtain the 99% confidence interval from SPSS, how could…

A: Given information: Confidence level=99%=0.99α=1%=0.01

Q: If is a sample that is used to estimate a population proportion p. What is the 99% confidence…

A: Given  Sample size n=112 and proportion of success p= 0.598

Q: raw score that is 1.96 blank above the sample mean

A:

Q: What is A confidence interval for μ?

A:

Q: What happens in a confidence interval if the size of the sample increases the length of interval

A: WIdth of a confidence interval = W Margin of error = E

Q: What effect does increasing the sample size have on the width of a confidence interval? I know that…

A:

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a…

A:

Q: 1. How can you make a 95% confidence interval smaller without changing the confidence level?

A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

Q: identify the t-score for a 90% confidence interval if the sample size is 31.        t=

A:

Q: A large trucking company wants to estimate the proportion of its tracker truck population with…

A:

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

A: Given:Margin of error (E) = 0.09Confidence level = 90%Since, the proportion of people that support…

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

A:

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

A: Given that, If the prior information is unknown, assume that the sample proportion is, p^=0.50…

Q: When calculating a confidence interval for one sample with a continuous outcome and the sample…

A: It is given that the sample size is greater than 30.

Q: Michael wants to make a confidence interval estimate for the proportion of community members in…

A:

Q: a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is…

A:

Q: If we increase our sample size the width of the confidence interval will

A: As the sample size increases, the standard error decreases and the margin of error also decreases.…

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: A researcher wishes to estimate the 95% confidence interval of the proportion of students who show…

A: Given  e=Margin of error=30%=0.30,  p^=30%=0.30, level of significance ɑ=0.05

Q: Suppose, upon constructing a 95% confidence interval based on your sample proportion of 0.28, you…

A: It is given that, A random sample of 125 M&M candies is selected where 28% are blue. Sample…

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

A: As there is no any estimates available, the sample proportion is assumed to be 0.50, that is,…

Q: f a Random Sample of 450 adults includes 155 who identify as happy, compute an 80% confidence…

A: Given data,n=450x=155sample proportion p=xn=155450=0.34z-value at 80% confidence is Zc=1.282

Q: After looking at some sample data, we find our 95% confidence interval estimate for a population…

A: Given95% confidence interval estimate for a population mean (μ)=(16,46)Upper limit = 46Lower limit =…

Q: suppose that in sampling for the population proportion, it is found that 20 out of 100 items are…

A:

Q: The Pizza Shop wanted to determine what proportion of its customers ordered an only cheese pizza.…

A: