Answer the following: 1. What is the corresponding percentile and x- value that has a z-score = -2.3 with mean = 100 and standard deviation = 10 ?

Q: number 4

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A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

Q: what percent of values fall between 5.25 and 8.75 if the mean =9 and standard deviation =2.36

A: Answer: From the given data, Mean (μ) = 9 Standard deviation (σ) = 2.36 X follows normal…

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Q: The life of a 9-volt battery is normally distributed with a mean of U = 2000 hours and a standard…

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A: Given that  a data has a mean μ = 27                                  standard…

Q: A normal distribution of scores has the following: mean = 120 standard deviation = 20 What range of…

A: given data normal distribution μ = 120σ = 20 for middle 60%  range = ?

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A: Given, z-score = 0.875 standard deviation = 0.0008

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A: We have given that,  Let X be a random variable following normal distribution with mean (Mu) = 5.382…

Q: what percent of values fall between 5.25 and 8.75 if the mean =8 and standard deviation =1.89

A: Mean=8 Standard deviations=1.89

Q: what percent of values fall between 5.25 and 8.75 if the mean =7 and standard deviation =1.75

A: Mean=7 Standard deviations=1.75

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A: Given that,  Mean = 85 nd standard deviation= 3 We've to find 65th percentile.

Q: what percent of values fall between 5.25 and 8.75 if the mean =5 and standard deviation =1.86

A: Answer: From the given data, Mean (μ) = 5 Standard deviation (σ) = 1.86 X follows normal…

Q: Is the height (in inches) of students in this class a quantitative or qualitative variable

A: Qualitative variable : It contains name or levels Example : eye colour, method of study...…

Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

A: Given that.   X~N( μ , ?^2 )   μ=71   , ?=?  , X=35 , z=-0.60   Z-score =( x - μ )/?

Q: For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200…

A: given data μ = 1200σ = 120normal distribution

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Q: In each situation below, calculate the standardized score (or z-score) for the value x. A USE SALT…

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Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

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