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 17:30
Is it true or false i’m trying to pass this test so i can leave school
Answers: 2
Mathematics, 21.06.2019 23:30
Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 46, 19, 38, 27, 12, 38, 51 minimum maximum median upper quartile lower quartile
Answers: 1
Mathematics, 22.06.2019 00:00
Afarmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. each bag of soil covers 20 square yards. how many bags should the farmer purchase? (4 points) 1 bag 2 bags 3 bags 4 bags
Answers: 2
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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