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A set of data items is normally distributed with a mean of 23 and a standard deviation of 5.7. Find the data value in the distribution that corresponds to each of the following z-scores. Round your answers to the nearest tenth.
(a) z = -1.3
(b) z = 2.45
A company has four departments: manufacturing, distribution, marketing, and management. The number of people in each department is 55, 30, 21, and 13.
use normal approximation to estimate the probability of getting exactly 47 girls in 100 births. assume that boys and
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The ACT is also distributed with meanof 21 and standard deviation of 4.7. Rachel wants to be in the 98th percentile on each test. What scores must she recieve on each exam?
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