Construct a 95% confidence interval for the population proportion that claim to always buckle up.

Q: A survey of 800 women shoppers found that 17% of them shop on impulse what is the 98% confidence…

A: Sol:- To calculate the 98% confidence interval for the proportion of women shoppers who shop on…

Q: Find the critical value for the population mean if there are 756 cats in a sample and you want a 91%…

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Q: A survey of 540 depressed shoppers found at 32% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 540 confidence level,c=0.99 Significance level, α…

Q: A sample of 60 people who were chosen for a sample had an average IQ score of 105. If the population…

A: From the given, x¯ (mean IQ score from sample)=105n (sample size)=60σ (population SD of IQ…

Q: When Mendel conducted his famous genetics experiment with peas, one sample of offspring consisted of…

A: Obtain the 95% confidence interval estimate of the percentage of yellow peas. The 95% confidence…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: It is given that, x is 311 and n is 400.

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: A bank randomly selected 200 checking-account customers and found that 110 of them also had savings…

A: Given that A bank randomly selected 200 checking-account customers and found that 110 of them also…

Q: confidence interval for the proportion of unemployed adults who have been unemployed for more than…

A: Here given  In a survey of 532 unemployed adults, 225 said that they had been unemployed for more…

Q: A recent survey showed that among 850 randomly selected subjects who completed 4 years of college,…

A: I'm providing the solution below please do refer it and let me know if you have any queries…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: Solution

Q: The Centers for Disease Control and Prevention reported a survey of randomly selected Americans age…

A: Confidence interval for Proportions : The following is the formula for confidence interval of the…

Q: A recent study of 2700 children randomly selected found 21​% of them deficient in vitamin D. ​…

A: Given that, 2700 children randomly selected found 21​% of them deficient in vitamin D. n=2700p^=0.21…

Q: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…

A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure.  X = 31 N =…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: Out of 180 randomly selected adults in the United States who were surveyed, 81 exercise on a regular…

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Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

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Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given data X = 480 Sample size (n) = 500

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: 67% out of 150 pupils from school A passed an exam; 62% of 120 pupils at school B passed. Estimate…

A: Given : n1 = 150 n2 = 120 confidence level,c=0.9

Q: Determine from a confidence interval whether a test is significant?

A: Null hypothesis states that there is no difference between populations or a set of given…

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

A: It is given asFavourable cases, x = 20901Sample size, n = 45535Confidence level = 99%

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

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Q: A random sample of 5005 adults in a country includes 755 who do not use the Internet. Construct a…

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Q: Joe’s Pizza Joint found that 64.2% of the 328 pizzas sold last week included pepperoni. Find a98%…

A: Obtain the 95% confidence interval for the proportion of Joe’s customers that order pepperoni. The…

Q: Construct a confidence interval for GDP in Sweden from 1990-2021.

A: Gross Domestic Product of the data from 1990-2021 1990 240 1991 241 1992 243 1993 210…

Q: One of Mendel s famous genetic experiments yielded 580 peas with 428 of them green and 152 yellow.…

A: The total number of peas taken for a genetic experiment is 580Number of yellow peas=152Number of…

Q: In a survey of 3235 adults 1499 say they have started paying bills online in the last year. A 99%…

A: Solution: Let X be the number of adults say they have started paying bills online in the last year…

Q: An internet service provider sampled 1000 of its customers, 189 of them experienced an interruption…

A: It is given that sample size (n) is 1000 and x is 189.

Q: A sample of 400 homeowners includes 124 that expect their home to increase in value in the next…

A: Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: 82 adults selected randomly from one town, 66 have health insurance. Find a 90% confidence interval…

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Q: In a sample of 1901 patients who underwent a certain type of surgery, 22% experienced complications.…

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Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 425 green peas…

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Q: Out of 100 people sampled, 44 have lied to a family member in the past month. Based on this,…

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Q: A sample of 421 adults showed that 239 of them are connected to the Internet from home.  Construct…

A: From the provided information, Sample size (n) = 421 From which 239 are connected to the Internet…

Q: A survey found that 611 out of 663 college graduates cannot correctly spell the word aluminum. Find…

A: Given that  A survey found that 611 out of 663 college graduates cannot correctly spell the word…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: Givenx=316sample size(n)=391Confidence level=95%p^=xn=316391≅0.8082

Q: Out of 157 randomly selected adults in the United States who were surveyed, 77 exercise on a regular…

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Q: Construct the indicated confidence interval for the population mean µ using the t-distribution.…

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Q: In a random survey of 2221 North Americans 689 of them had blood type A+. Construct a 94% Confidence…

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Q: A survey conducted by the U.S. department of Labor found the 48 out of 500 heads of households were…

A: Given that, n = 500 x = 48 90% confidence interval