Area under the normal curve
Find the area under the normal curve between 0.9 standard deviations on both sides of the mean.
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Find the probability that a card drawn from a standard deck of playing cards will be either a four or a diamond.
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We draw a ball from a bag that contains four red balls and eleven white balls. We replace the ball and draw another ball. What is the probability that both balls are white balls?
If the standard deviation for a population, as estimated from a sample, is s = 5.6, then the standard error for a sample size of N = 16 is:
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