Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 653. A random sample of 33 years is selected from this population. What is the probability that the mean gain for the sample was between 400 and 800? Assume σ = 1540. The probability is (Round to four decimal places as needed.)

Calculus For The Life Sciences
2nd Edition
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Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
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Find the indicated probability and interpret the result.
From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 653. A random sample of 33
years is selected from this population. What is the probability that the mean gain for the sample was between 400 and
800? Assume σ = 1540.
The probability is ☐
(Round to four decimal places as needed.)
Transcribed Image Text:Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual gain of the Dow Jones Industrial Average was 653. A random sample of 33 years is selected from this population. What is the probability that the mean gain for the sample was between 400 and 800? Assume σ = 1540. The probability is ☐ (Round to four decimal places as needed.)
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