1.(a) Find the range. (Enter an exact number.)
1.(a) Find the range. (Enter an exact number.) (b)
Consider the data set.
2, 5, 7, 8, 9
Use the defining formula to compute the sample standard deviation s. (Enter a number. Round your answer to two decimal places.)
(c)
Use the defining formula to compute the population standard deviation σ. (Enter a number. Round your answer to two decimal places.)
2.
Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Enter a number. Round your answer to four decimal places.)
The area to the left of z = 0.53 is
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