Suppose that insurance companies did a survey. They randomly surveyed 450 drivers and found that 310 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up.Compute the margin of error for a 95% confidence interval and construct this confidence interval for the population proportion who claim they always buckle up. (i) State the margin of error. (Round your answers to four decimal places.) m =  (ii) State the confidence interval. (Round your answers to four decimal places.)

Q: The data given to the right includes data from 40 ​candies, and 8 of them are red. The company that…

A: The known values are, The sample proportion is, Critical values: By using the standard normal…

Q: The formula P %3D n + 4 is describing the [Select ] method for calculating an approximate confidence…

A: Solution: X=no of successes  n=no of experiments  To find approximate confidence interval for a…

Q: A November 2018 CBS News Poll found that 35% of its sample planned to use online retailers for most…

A: Given that, A November 2018 CBS News Poll found that 35% of its sample planned to use online…

Q: eth wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

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

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: 3. In a 2009 Gallup Poll, 441 of 507 adults said it was "morally wrong" to clone humans. Assume…

A: Solution : Given :  x = 441              n = 507 Sample proportion is, p = xn = 441507     = 0.8698…

Q: in order to construct a 95% confidence interval for the population mean when the population…

A: It is an important fact in hypothesis testing problem .It is widely used in statistics .

Q: In a survey, a random sample of teenagers were asked whether they have a sibling. The resulting…

A:

Q: According to a Gallup Poll taken in East Germany, when adults were asked whether they were thriving,…

A:

Q: calculate a 95% confidence interval for the mean profit per customer that SoftBus can expect to…

A: Given : n=3 , ƩX=13500 , ƩX2=61250000 Now ,  The sample size is , n=3 The sample mean is ,…

Q: If, based on a sample size of 850​, a political candidate finds that 479 people would vote for him…

A: Given that  n=850 , X=479 Find 95​% confidence interval for his expected proportion of the​ vote?

Q: music fans yields this 95% confidence interval estimate of the proportion of fans who love the music…

A: The sample proportion can be calculated as: Sample Proportion=LowerLimit+UpperLimit2 Thus, Sample…

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that; Sample size (n) = 120  X = 88  At 90% confidence interval .

Q: A​ 95% confidence interval for the proportion of U.S. adults who subscribe to some sort of streaming…

A: In the above question, we are given,  a confidence interval is

Q: 1. Suppose survey results say that 69% of the adult females from a sample taken in the United States…

A: Proportion (p) = 69 %  Margin of Error (E) = 3%  Alpha = 95%  FIRSTLY calculate the confidence…

Q: 1992, the women in two statistics classes for students in the liberal arts at a large northeastern…

A: In 1992, the women in two statistics classes for students in the liberal arts at a large…

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: In a 2009 Gallup Poll, 441 of 507 adults said it was “morally wrong” to clone humans. Assume Gallup…

A:

Q: 1. In a recent study, the researchers want to find the information about the percentage of adults…

A: Given datan = 3026proportion of people who prefer to get their news online = 0.38

Q: an epidemiologist is womied about the prevalence of the flu in East Vancouver and the potential…

A: Given data, n=331 x=33 E=0.05 z-value at 95% confidence is Zc=1.960 n=?   p=x/n=33/331=0.0997

Q: Using p′=0.167, q′=0.833, and n=180, what is the 95% confidence interval for the proportion of the…

A:

Q: Beth wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Here we need to find the required sample size inorder to construct a 95% confidence interval for the…

Q: In a previous election, the confidence interval for the proportion of likely voters who would vote…

A: given;confidence interval for the proportion;(0.4401, 0.5199)i.e. (p^-E, p^+E)where  p^ : point…

Q: A random sample of residents in city J were surveyed about whether they supported raising taxes to…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: 1. Suppose you compute a confidence interval with a sample size of 40. What will happen to the…

A:

Q: Select the correct response. a) Given the same sample data, the margin of error in a 90% confidence…

A: a) Given the same sample data, the margin of error in a 90% confidence interval would be smaller…

Q: 1. A study constructed a 95% confidence interval for the proportion of adults in the U.S. that have…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: Suppose you constructed a 90% confidence interval for the true average GPA of California community…

A: Solution: 1. From the given information, 90% and 80% confidence interval for the true average GPA of…

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: The researcher rejected the null hypothesis at the 95% confidence level where r(14) = .72, p = .002.…

A: The correlation coefficient lies between -1 and +1. The correlation coefficient along with effect…

Q: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

A:

Q: In a survey, the planning value for the population proportion is p*=0.25 . How large a sample should…

A: It is given that, the population proportion is p*=0.25. The level of confidence is 95% level. The…

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: We have given 90% confidence interval for proportion then we have to find the sample size for the…

Q: A poll of 2500 people shows that 50% approve of a smoking ban in bars and restaurants in Kentucky.…

A: Given, n = 2500 p = 50% = 0.50 At 95% Confidence level, the value of Z is 1.96

Q: In a situation where the sample size was decreased from 39 to 29, what would be the impact on the…

A: The confidence interval depends on the three factors: Confidence level: The width of the…

Q: A recent survey of cell phone users indicated that 56 percent of the respondents prefer to use cell…

A: Given that 56% of the respondents prefer to use cell phones for texting rather than for making phone…

Q: In a poll conducted, 439 of 1007 adults in a certain country polled said they were "picky eaters."…

A: a. The proportion of the respondents said they were picky eaters is, p^=xn=4391007=0.4359≈0.44 Thus,…

Q: You find a confidence interval on proportion to be: 45.1% < p < 50.9% What is p? What is the…

A: Given confidence interval is  45.1% &lt; p &lt; 50.9% p=? Margin of error (E)=?

Q: Many high school students take the AP tests in different subject areas.  In 2007, of the 144,796…

A: It is given that x1=84,199, n1=144,796, x2=102,598, n2=211,693.

Q: An economist at the Florida Department of Labor and Employment needs to estimate the unemployment…

A: Given

Q: Identify the t- scores for a 99% confidence interval if the sample size is 70?

A: We have to find critical value.

Q: a) Using a sample size of 75, construct a 95% confidence interval estimate of the mean birth weight…

A: here given ,  A study has been conducted to verify the mean of birth weight at Apple County. From…

Q: find the t/α2 value for an 80% confidence interval for the mean when the sample size is 14

A:

Q: A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to…

A: Solution: Let X be the number of blooms that yield marketable strawberries and n be the sample…

Q: 2. You are going to construct a 90% confidence interval for the proportion of adults that have a…

A: From the given information, let X be the number of adults that have a post-secondary education. The…

Q: In a survey, the planning value for the population proportion is p* = 0.35. How large a sample…

A: Find z-critical value. Refer Standard normal table/Z-table OR use excel function…

Q: In a survey of 900 adults, 240 said that they watched the World Cup final on television. Using these…

A: Given, The sample proportion is,

Q: For one NBA playoff game the actual percentage of the television viewing public who watched the game…

A: Given information: PWatching the game=24%=24100=0.24n=50

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.