Question1: In a study, a sample of 12 participants rated their pain level as when they repeated a swear word than when they repeated a neutral word. ues of swear and neutral words. Calculate 95% confidence interval at an a

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: There are 3000 beads of various colors in a jar. In a sample of 125 beads, 40% were red. Calculate…

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Q: n = 260 and X = 208, construct a 90% confidence interval for the population proportion, p. Give…

A: Given data,x=208n=260p^=xn=208260=45=0.80

Q: In a random sample of 100 customers, the items that customers purchased were tracked. It was found…

A: Given,sample size(n)=100sample proportion(p^)=0.171-p^=1-0.17=0.83α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: Lindsey selected a random sample of 25 tomatoes at the farmer's market. The 95% confidence interval…

A: When Lindsey selected a random sample of 25 tomatoes at the farmer's market, she was aiming to…

Q: A random sample of 230 people living in Seattle found that 83 of them had a pet. A random sample of…

A: Solution: Given information: n1= 230 Sample size of people iving in Seattle n2= 172  Sample size of…

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: Using the 99% level of confidence, what is the confidence interval for proportion of students…

A: Let X be the random variable such number of students attending home football games. X = 750 N: Total…

Q: If n = 180 and X = 144, construct a 90% confidence interval for the population proportion, p. Give…

A: Solution: From the given information, X=144, n=180 and the confidence level is 0.90. The sample…

Q: In a survey of 2002 adults in a recent​ year, 701 made a New​ Year's resolution to eat healthier.…

A: Given:

Q: Out of 200 people sampled, 42 had kids. Based on this, construct a 95% confidence interval for the…

A: For 95% confidence intervalα=1-CI=1-0.95=0.05So, zα2=z0.052=z0.025=1.96

Q: a recent study of 100 people in Burlingame found that 19 were obese.  Find the 90% confidence…

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Q: In a survey of 2004 adults in a recent​ year, 717 made a New​ Year's resolution to eat healthier.…

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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: You collect a sample of 69 observations of animal heights, in mm. The sample mean is 41.89 and the…

A: Given: x¯=41.89s=4.33n=69 The degrees of freedom is obtained as below: df=n-1=69-1=68 The critical…

Q: In a survey of 612 randomly selected female college students, 141 report that they had been sexually…

A: Given Information:n=612x=141c=95%=0.95

Q: A large container contains colored beads. A simple random sample of beads yielded 107 red beads and…

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Q: A random variance survey of 495 adults found that 59 had diabetes. which of the following is a 98%…

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Q: What is the value of Z for this confidence interval?

A: Given,sample size(n)=14795no.of people who said yes=2219no.of people who said no =12576

Q: How much more sensitive to contrast are athletes with eye grease than without eye grease? Give a 95%…

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Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: In a sports poll, 142 of 500 randomly selected Americans indicated that they consider themselves to…

A: Given that, In a sports poll, 142 of 500 randomly selected Americans indicated that they consider…

Q: 7 out of 70 students said they were comfortable with “working in a workplace with a lot of…

A: Given that  57 out of 70 students said they were comfortable with “working in a workplace with a lot…

Q: A sample of 1,000 employees in an international company was taken to estimate the average…

A: Confidence interval of mean is given by, (X bar + - Z* sigma/√n) Where X bar is mean and sigma is…

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

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Q: A research institute asked students if they felt vulnerable to identity theft. In the poll, n=1047,…

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Q: From a lake, an unknown proportion of fish have been tagged.  You collect a sample of 100 fish taken…

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Q: In a survey of 2013 adults in a recent​ year, 731 made a New​ Year's resolution to eat healthier.…

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Q: In a science fair​ project, Emily conducted an experiment in which she tested professional touch…

A: Given data, n=330 x=155 sample proportion p=x/n =155/330=0.47   z-value at 95% confidence is zc=1.96

Q: FIND 90% CONFIDENCE INTERVAL FOR THE DIFFERENCE IN POPULATION PROPORTIONS Pf -Pm .

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Q: Find the margin of error for the​ 99% confidence interval used to estimate the population…

A: p^ : Sample Proportion 35% of the patients showed improvement. So, probability that a patient shows…

Q: Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence…

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Q: A scientist conducts an experiement with flowers, one sample of flowers consisted of 278 red dahilas…

A: Given that  Sample size n =278 Favorable cases x =108 Sample proportion p^=x/n  =108/278 =0.3885

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: A marketing study with a random sample of 400 results in 160 subjects reacting positively to the…

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Q: A random survey of 150 CBC students found that 35 of them intended to transfer to WSU Tri-Cities…

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Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…

A: