(D) If the population has a bell-shape distribution, what proportion of observations are smaller than 1,700?

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Answer for question D

11. A population has a mean of 2,300 and a standard deviation of 300.
(A) If we assume that the population has an unknown shape, find the minimum proportion of observations
in the population that are in the range 1,400 to 3,200.
(B) If the population has a bell-shape distribution, what proportion of observations are greater than 2,600?
(C) If we assume that the population has an unknown shape, determine the maximum proportion of the
observations that are below 1,700.
(D) If the population has a bell-shape distribution, what proportion of observations are smaller than 1,700?
Transcribed Image Text:11. A population has a mean of 2,300 and a standard deviation of 300. (A) If we assume that the population has an unknown shape, find the minimum proportion of observations in the population that are in the range 1,400 to 3,200. (B) If the population has a bell-shape distribution, what proportion of observations are greater than 2,600? (C) If we assume that the population has an unknown shape, determine the maximum proportion of the observations that are below 1,700. (D) If the population has a bell-shape distribution, what proportion of observations are smaller than 1,700?
Expert Solution
Step 1

We have given that, 

Let X be a random variable from bell-shape distribution (Normal distribution) with mean (Mu) = 2300 and standard deviation (sigma) = 300

Then, 

(D) We will find the proportion of observations are smaller than 1700= ? 

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