population proportion, what is the 95% confidence interval estimating the proportion of businesses who believe it is harder to run a business now than 5 years ago?     a) (0.53318 , 0.60798)     b) (-0.53318 , 0.60798)     c) (0.5515 , 0.58966)     d) (0.54919 , 0.59196)     e) (0.39202 , 0.46682)

Q: In Cleveland, a random sample of 73 mail carriers showed that 10 had been bitten by an animal during…

A: Given, n1 = 73 x1 = 10 n2 = 80 x2 = 16 confidence level = 1 - α = 0.95 α = 0.05α2 = 0.025   To find,…

Q: A newsgroup is interested in constructing a 95% confidence interval for the difference in the…

A:

Q: A survey of an urban university (population of 35,540) showed that 840 of 1,300 students sampled…

A: A survey of an urban university (population of 35,540) showed that 840 of 1,300 students sampled…

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Q: The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least…

A:

Q: A recent study was conducted in Santa Clara County, California.  Random samples of 3,330 people were…

A: Given, Number of samples tested(n)= 3330 Number of people tested positive(x)= 50   The z value at…

Q: Out of 240 sample students surveyed, 187 students are planning to take classes during the…

A: We have given that the sample size n=240 and favourable cases X=187. Sample proportion p^ = X/n.

Q: In a random sample of205people,147said that they watched educational television. Find…

A: Solution: Let X be the number of people who watched educational television and n be the sample…

Q: The president of the Madaba Bank wants to confırm her belief that the bank has a low rate of…

A:

Q: In a recent poll, from a sample of 300 likely voters, 175 answered they approve the way the…

A: We have given that,  Favorable cases (X) = 175 and sample size     (n) = 300 then,  We will find the…

Q: A large-sample 98% confidence interval for the proportion of hotel reservations that are canceled on…

A: From the provided information, Confidence level = 98% Confidence limits = (0.048, 0.112)

Q: Suppose that a market research firm is hired to estimate the percentage of adults living in a large…

A: From the given information, x=64 and n=94.

Q: A newsgroup is interested in constructing a 95% confidence interval for the difference in the…

A:

Q: A survey of 90 community members was conducted to measure if community members favored opening a new…

A: It is given that sample size (n) is 90 and x is 68.

Q: According to a report published by the Pew Research Center in 2010, 61% of Millennials (Americans in…

A: Solution: From the given information, p-hat=0.61, n=527 and confidence level is 0.99.

Q: A random sample of 29 students is surveyed from a dorm and 13 report there regularly being times…

A:

Q: A newsgroup is interested in constructing a 90% confidence interval for the difference in the…

A: From the provided information,

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A: Given  X1=63, n1=100, X2=59, n2=125

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A: It is given that Sample size n = 263 Number of students who prefer final exam, X = 39 The critical…

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A:

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A:

Q: A U.S. Travel Data Center survey conducted for Better Homes and Gardens of 1500 adults found that…

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A: Solution: Let X be the number of people who watched educational television and n be the sample…

Q: In a survey of 2,472 adults, 1,949 reported that​ e-mails are easy to​ misinterpret, but only 1,281…

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A: Given 99% CI for population proportion of all students at this college is (0.78,0.98)

Q: In a survey of 3299 adults aged 57 through 85​ years, it was found that 82.2​% of them used at least…

A: It is given that sample size (n) is 3,299 and p hat value is 0.822.

Q: What is the correct interpretation of this confidence interval

A: The 99% confidence interval for the proportion of all students at this school who have their names…

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A:

Q: A smart phone manufacturer is interested in constructing a 90% confidence interval for the…

A: a) The sample size n= 1595.for The sample proportion is 90/1595=0.0564. The absolute value of Zα/2…

Q: A poll by a reputable research center asked, "If you won 10 million dollars in the lottery, would…

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Q: A researcher who was interested in knowing how many people in a city supported a new retirement plan…

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Q: A newsgroup is interested in constructing a 95% confidence interval for the difference in the…

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Q: 2016, 535 adults aged 18 years old or older were asked if they think that there is some form of life…

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Q: . In a random sample of 250 television viewers in a large city, 190 had seen a certain controversial…

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A:

Q: A recent survey showed that 42% of US employers were likely to require higher employee contributions…

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Q: A newsgroup is interested in constructing a 90% confidence interval for the difference in the…

A:

Q: A newsgroup is interested in constructing a 90% confidence interval for the difference in the…

A: x1 = number of Texans in favor of the initiative n1 = number of Texans surveyed x2 = number of New…

Q: A newsgroup is interested in constructing a 95% confidence interval for the difference in the…

A: (a)   Obtain the 95% confidence interval for the difference in the proportions of Texans and New…

Q: A study of 420,095 Danish cell phone users found that 0.0321% of them developed cancer of the brain…

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A: Given  X1=28, n1=65, X2=36, n2=97

Q: A newsgroup is interested in constructing a 99% confidence interval for the difference in the…

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

Q: A newsgroup is interested in constructing a 90% confidence interval for the difference in the…

A: a). Given, As per z-distribution table, the critical value of z at 90% confidence level is obtained…

Q: With 90% confidence the difference in the proportions of Texans and New Yorkers who favor a new…

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