According to Nielsen Company, the mean number of TV sets in a US household in 2013 was 2.24.  Assume the standard deviation is 1.3. A sample of 85 households is drawn.   what is the probability that the sample mean number of TV set is greater than 2? what is the probability that the sample mean number of TV sets is between 2.5 and 3? what is the 30th percentile of the sample mean? would it be unusual for the sample mean to be less than 2? what is the probability of the sample mean being less than 2?

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: The mean is 500 and the standard deviation is 100.

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A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

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A: Given Information: The time that a shopper spends in the grocery store is normally distributed with…

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A: What is the standard error of mean?

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A: X follows a Normal distribution with mean = 70000 and S.D = 12000 Then z=(x-mean)/SD =…

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A: Solution-: Given: μ=12,σ=0.25 We find x value such that P[X<x]=0.15

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A: Given,mean(μ)=87standard deviation(σ)=12

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A: Given that Random sample size(n) =48 Mean body mass index (x¯)=28.3 Sample standard deviation (s)…

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A:

Q: In 1955, Life Magazine reported that the 25 year-old mother of three worked, on average, an 80hour…

A: Solution: Given information: n= 85 Sample size  x= 83.5 Sample mean μ= 80 Populaion Mean s= 10…

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A: Given: n= 101.0 ,x̄= 31000.0 ,s= 5000.0 µ= 35000.0 ,significance level(∝)= 0.02Now here using…

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A: As per our guidelines we suppose to answer three sub parts.

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A: GivenMean(μ)=4300standard deviation(σ)=750

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A: Given,sample size(n)=60mean(μ)=281standard deviation(σ)=47

Q: According to the Runzheimer International, a typical business traveler spends an average of $281 per…

A: Here, µ = $281, σ = 47, and n = 65.

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

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Q: reported that the 27-year-old mother of three worked, on average, a 75 hour week. Recently, many…

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Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A: Given information Mean (µ) = 24 Standard Deviation(σ) = 2 X = 27

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A: The mean is 5,000,000 and the standard deviation is 450,000.

Q: The mean score on the SAT in 2017 was 1060, and the standard deviation was 195. Assume the scores…

A: Given,  Mean μ=1060  Standard deviation σ=195Let x be score of a randomly selected person

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A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

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Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A:

Q: According to Runzheimer International, a typical business traveler spends an average of $281 per day…

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Q: The waiting time for patients at a local walk-in health clinic follows a normal distribution with a…

A: We have to find hypothesis..

Q: Recently, a random sample of 25–34 year olds was​ asked, "How much do you currently have in​…

A: Class Interval Frequency(f) Midpoint (x) f.x fx2 0-199 342 (0+199)/2= 99.5 34029 3385885.5…

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A: Given: Sample mean x¯=30.15 Sample standard deviation (s) =  12 Sample size (n) = 59 Hypothesized…

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A: Given information, Mean =516 Standard deviation =116

Q: The distribution of the number of viewers for the American Idol television show follows a normal…

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A: Given information- Population mean, µ = $3200,000 Population standard deviation, σ = $250,000 We…

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Q: The standard deviation of the distribution of sample means would be equal to:

A: The standard deviation of the distribution of sample means would be equal to ?

Q: For a population with a mean of μ = 55 and a standard deviation of σ = 23, what is the standard…

A: Given : a population with a mean of μ = 55 and a standard deviation of σ = 23   We need to calculate…

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Interpret the ­z-score of 1.45 in terms of its relationship to standard deviation as well as the…

A: Solution: From the given information, z=1.45.

Q: In 1955, Life Magazine reported that the 25-year-old mother of three worked, on average, an 80 hour…

A: Claim : the mean work week has increased for women

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: Note: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we…

Q: According to a study of TV viewing habits, the average number of hours an American over the age of 2…

A: Given data,Standard deviation is σ=16If n=64 standard error of the mean(σx)=?