Mathematics, 18.12.2020 22:20 BECKX2510
We can use the z-score to find the probability of many other events. Let's explore those now.
a. Suppose that the mean time a typical American teenager spends doing homework each week is 4.2 hours. Assume the standard deviation is
0.9 hour. Assuming the variable is normally distributed, find the percentage of American teenagers who spend less than 3.5 hours doing
homework each week.
b. According to a College Board report, the population of American 2008 high school graduates had a mean Math SAT score of 515 with
standard deviation of 116. What is the probability that of a randomly selected senior from this population scoring between 500 and 800 on the
Math portion of the SAT Reasoning Test?
Answers: 3
Mathematics, 21.06.2019 17:00
Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l
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Mathematics, 22.06.2019 04:10
A. 2.3y +2 +3.1y = 4.3y + 1.6 + 1.1y + 0.4 b. + 25 - = c. 5/8x + 2.5 = 3/8x + 1.5 + 1/4x d. 1/3 + 1/7y = 3/7y
Answers: 2
Mathematics, 22.06.2019 05:30
Can you me with perpendicular lines and parallel lines?
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Mathematics, 22.06.2019 06:30
After how many years are the salaries offered by company a and company b the sameco. a starting salary $24,000 yearly increase of 3000co. b starting salary $30,000 yearly increase of 2400
Answers: 1
We can use the z-score to find the probability of many other events. Let's explore those now.
a. Su...
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