Mathematics, 17.09.2019 07:00, smckinney6139
Students in a class take a quiz with eight questions. the number x of questions answered correctly can be approximated by the following probability distribution. complete parts (a) through (e).
x p(x)
1 0.020.02
2 0.040.04
3 0.060.06
4 0.080.08
5 0.130.13
6 0.250.25
7 0.190.19
8 0.150.15
9 0.08
(a) use the probability distribution to find the mean of the probability distribution. muμequals=55(round to the nearest tenth as needed.)
(b) use the probability distribution to find the variance of the probability distribution. sigma squaredσ2equals=3.63.6(round to the nearest tenth as needed.)
(c) use the probability distribution to find the standard deviation of the probability distribution.1.91.9(round to the nearest tenth as needed.)
(d) use the probability distribution to find the expected value of the probability distribution. 55(round to the nearest tenth as needed.)
Answers: 1
Mathematics, 21.06.2019 21:30, jtorres0520
Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?
Answers: 3
Mathematics, 21.06.2019 22:20, dontworry48
Which graph represents the given linear function 4x+2y=3
Answers: 1
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