Determining probability problems

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Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.

What scores (X's) form the boundaries for the middle 30% of the distribution?

What is the minimum score to be in the bottom 53% of the distribution?

Sketch a graph and shad the area of interest. A normally distributed population with u = 30 and o = 6.

What is the probability of randomly drawing a sample of n=9 with a mean greater than 32?

What is the probability of randomly drawing a score that falls between 20 and 35?

On a psychology exam with u=70 and o=8, Brian scores at the mean, Chloe had a score x=68 and Amy had a z-score of -65. Place these students in order from lowest to highest.

Reference no: EM13100276

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