4) Which of these samples would have the smallest standard deviation? a. 101, 92, 84, 131 b. -25, -10, -19, -3 с. 15, 9, 2, 21 d. 190, 187, 189, 192

Q: Ques 3 ,4 and 5

A: This is a basic problem of central tendency . It is very useful.

Q: q2-- find the mean for the given data. x: 1,1,1,1,1,2,2,2,2,3,3,3,4,5,5,5,6,6,6,6,7,7,7,7,7

A: We know that  Mean  = sum of all observations/total number of observations

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A: Given that.   X~N( μ , ?)   μ=130     , ?=5  , x=143   Z-score =( x - μ )/?

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A: Given,standard deviation (σ)=16margin of error (E)=2α=1-0.88=0.12α2=0.06Z0.06 =1.5548

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A: Solution

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A: Complete solution and answer is given in the image uploaded below  Thanks!

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A:

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A: L

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Q: Suppose that a sample of 15 observations has resulted in a sample mean of 12.58 and a sample…

A: n1=15, mean X̄n1=12.58, sn1=0.512

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A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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A:

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A: From the provided information,n = 20

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A:

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A: We have to find median of data.

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A: Given: s=25 9 is added to each of the values.

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A: From the provided information, Mean (µ) = 13 GB Standard deviation (σ) = 3 GB

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A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 28 X~N (100, 28)

Q: f the data given (Marks 0-9,10-19,20-29,30-39,40-49,50-59,60-69,70-7

A: Given data, Marks No. of students 0 - 9 2 10 - 19 3 20 - 29 8 30 - 39 24 40 - 49 27…

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A: Given: n = 50 X = 56 years σ = 6 μ = 52 Formula Used: Test-statistic Z = X-μσn

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A: From the provided information, The mean and standard deviation of data can be obtained as:

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A: Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k…

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A: given data population standard deviation = σn = sample sizestandard deviation of sample mean = σx¯we…

Q: Assume that weights of adult females are normally distributed with a mean of 79 kg and a standard…

A: Mean(μ)=79standard deviation(σ)=22