Mathematics, 11.02.2021 09:50, whitlee
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
Mathematics, 21.06.2019 15:30, davidaagurto
Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5
Answers: 1
Mathematics, 21.06.2019 23:00, ManBun99
Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?
Answers: 2
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