Determine if the outcome is unusual. Consider as unusual any result that differs from the mean by more than 2 standard deviations. That is, unusual values are either less than μ - 2σ or greater than μ + 2σ. 12) A recent coffee consumption study showed that among 1253 randomly selected subjects, 80% of them drank coffee every day. For such group of 1253 subjects, would it be significantly high to obtain 1005 coffee drinkers?

Q: Suppose that a randomized comparative experiment studies the effect of diet on blood pressure.…

A: GivenMean(x)=114.9standard deviation(s)=9.3sample size(n)=27Confidence  level = 95%

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: The bone density test scores that can be used as cutoff values separating the lowest 2​% and highest…

Q: The percent of fat calories that a person consumes each day is normally distributed with a mean of…

A: Solution: Let X be the average percent of fat calories. From the given information, X follows normal…

Q: Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard…

A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100 and standard…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 99.2 and a standard…

A: Given info: IQ scores are normally distributed with a mean of μ=99.2 and a standard deviation…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: Finding the value of z at lowest 14-1.08032 ( From Excel =NORM.S.INV(0.14))Finding the value of z at…

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A: Let us assume X=score Given that X follows a normal distribution with mean= 100 and standard…

Q: mean of 50 ounces and a standard deviation of 8.81 ounces. 8 homes with children are surveye Let X =…

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Q: Assume that 26% of students at a university wear glasses. Suppose 300 students are randomly…

A:

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: In a certain state, two-fifths of all adults register as Democrats.  A random sample of 150 adults…

A: From the information, given thatLet the random variable X denotes the number of registered Democrats…

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A:

Q: An article in a professional journal reports the z­-score for the study’s sample mean was z = –1.4.…

A: From the provided information,z = -1.4Sample mean (x̄) = 97Sample size (n) = 49Population mean (µ) =…

Q: The P-value for this hypothesis was found to be:

A: The test statistic is, z=x¯-μσn=78-682025=104=2.5 The test statistic is 2.5.

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.6 and a standard…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.1 and a standard…

A:

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

A:

Q: deviation

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Q: A small amount of the trace element selenium, from 50 to 200 micrograms (ug) per day, is considered…

A:

Q: A statistics teacher taught a large introductory statistics class, with 500 students having enrolled…

A: Given: μ=78σ=10n=25x¯=83

Q: Determine if the outcome is unusual. Consider as unusual any result that differs from the mean by…

A:

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96 and a standard…

A: We have given that  Mean of 96 and a standard deviation 20.9. X~Normal(μ=96,σ=20.9)

Q: In a population, the variable Rain is normally distributed with a mean of 10 and a standard…

A:

Q: Suppose a researcher wants to know if the average diastolic blood pressure in Irish-Americans is…

A: Solution

Q: Suppose that a randomized comparative experiment studies the effect of diet on blood pressure.…

A:

Q: A statistics teacher taught a large introductory statistics class, with 500 students having enrolled…

A: Given, The null and alternative hypothesis. and population mean and standard deviation. also Sample…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: A large airline company called Fusion Fly monitors customer satisfaction by asking customers to rate…

A: The mean is 4.10 and the standard deviation is 1.33.

Q: Assume that adults have IQ scores that are normally distributed with a mean of 95.6 and a standard…

A: Given: x~N(μ,σ)μ=95.6σ=24.3

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: Assume a test in biology is normally distributed with a mean of 80 and a standard deviation of 5.…

A:

Q: The average score of all golfers for a particular course has a mean of 61 and a standard deviation…

A: Mean()=61Standard deviation()=4Sample size(n)=64

Q: A psychopathologist records the number of criminal offenses among teenage drug users in a nationwide…

A: Given: SS = 10800 Sample Size (n) = 1201

Q: population, it was found that the diastolic blood pressure is normally distributed with a mean 81.5…

A:

Q: Suppose that the blood pressure of the human inhabitants of a certain Pacific island is distributed…

A:

Q: Assume that adults have iq scores that are normally distributed with a mean of 98.2 and a standard…

A:

Q: Suppose X, the grade on a midterm exam, is normally distributed with mean 80 and standard deviation…

A: Given information- Population mean, μ = 80 Population standard deviation, σ = 10 Suppose X is the…

Q: For men heights are normally distributed with a mean of 69 inches and a standard deviation of 2.8…

A: The random variable X is heights of the men. It is normally distributed. X~N(μ=69,σ=2.8) The sample…

Q: Is the difference between the mean annual salaries of registered nurses in State A and State B equal…

A: Given Information :  Provided claim is whether there is difference between the mean annual salaries…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103.1 and a standard…

A: According to the given information in this questionWe need to find first quartile

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Q: In a sample of 14 randomly selected high school seniors, the mean score on a standardized test was…

A: Given,Sample size , n = 14Sample mean , 1197Population mean , 1018Standard deviation, S = 166.9Using…

Q: A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n…

A: