Mathematics, 11.02.2021 14:00 jj1077348
21. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. The next five questions concern this distribution. What percentage of three-year-old boys are over 100 cm. tall?
(a) 1.4%
(b) 18.7%
(c) 40.1%
(d) 41.3%
(e) 81.3%
22. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. What percentage of boys are between 95 and 100 cm. tall?
(a) 1.4%
(b) 18.7%
(c) 40.1%
(d) 41.3%
(e) 81.3%
25. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. What is the standard score for a three-year-old boy who is 99.5 cm tall?
(a) –1.29
(b) –0.67
(c) 0.67
(d) 0.78
(e) 1.29
Answers: 3
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Mathematics, 21.06.2019 16:10, cuppykittyy
The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82
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21. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard...
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