10. Suppose approximately 95 % of people who wrote a standardised test had marks that ranged from 78 to 92 and the results were normally distributed. What is the standard deviation? (Assume the marks between 78 and 92 were

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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10. Suppose approximately 95 % of people who wrote a standardised test had marks that ranged from 78 to 92 and the
results were normally distributed. What is the standard deviation? (Assume the marks between 78 and 92 were
centered about the mean).
31
SAMSUNG
JCH
с
Ō
Transcribed Image Text:→ 10. Suppose approximately 95 % of people who wrote a standardised test had marks that ranged from 78 to 92 and the results were normally distributed. What is the standard deviation? (Assume the marks between 78 and 92 were centered about the mean). 31 SAMSUNG JCH с Ō
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