You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 40.6. You would like to be 98% confident that your estimate is within 2 of the true population mean. How large of a sample size is required? n=

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Q: Find the data value is Z = 1.6, µ-30, σ = 2.4 Write the data value rounded to 2 decimal places.

A: Given that μ=30,σ=2.4,z=1.6 Data value ( x )=?

Q: What is the range of this data set? range =  What is the standard deviation of this data set?

A: It is given that the sample of size n = 10 is  122.9 96.4 101.6 109.4 115.8 91.7 122.9 122.9 81…

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A: Z-score formula : z = (x̄ - μₓ̄ )/σₓ̄

Q: Isn't here the standard deviation equal to 4, not 2, as the tutor wrote?

A: Solution-: Given: μ=-3,σ=4 We want to find, P(0<X<2)=? Draw the picture.

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Q: What is the difference between estimated mean and population mean? Thank you

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Q: Given that the mean = 20 and the standard deviation o = 4, find P(x < 25).

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A: The following information has been given: n1=20        x¯1=2800          s1=600n2=28        x¯2=2200…

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A: Empirical rules:1) P(μ-σ&lt;X&lt;μ+σ)=68%2) P(μ-2σ&lt;X&lt;μ+2σ)=95%3) P(μ-3σ&lt;X&lt;μ+3σ)=99.7%

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Q: taken

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Q: Given the following, find the requested probability. Event B Event B Event A 19 24 Event A' 30 47

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Q: Find the critical value zα/2 that corresponds to the given confidence level: 92%.

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Q: The head start program provides a wide range of services to low-income children up to the age of 5…

A: Solution Given information