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Olin [163]
3 years ago
10

30 POINTS please help!! The scores of first-time players of a popular video game are recorded. The results follow a normal distr

ibution curve. The mean is 12,388 points with a standard deviation of 953 points. What is the probability that a randomly selected player’s score is more than 11,950 points?
A.
0.3228

B.
–0.46

C.
0.1550

D.
0.6772
Mathematics
2 answers:
Trava [24]3 years ago
6 0
Your answer is D, 0.6772, hope that helps
Murrr4er [49]3 years ago
4 0

Answer:

0.6772

Step-by-step explanation:

P(X>11950)=P(x-u>11950-12388

p(x-u/o)>11950-12388/953=-0.46

p(X>11950)=P(Z>-0.46)

p(Z>-0.46)=0.6772

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5-2x/3-5=x-5

-2x/3=x-5

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Answer: x=3

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A triangle has height 15 in. and area 120 in. what is the lenght of its base?
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The base of the triangle measures 16 in.
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As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. If the true percenta
tresset_1 [31]

Answer:

The probability is 0.057797

Step-by-step explanation:

Consider the provided information.

It is given that true percentage of voters who vote for the proposition is 63%,

Let p is probability of success.

According to the binomial distribution:

P(x;p,n)=^nC_x(p)^x(1-p)^{(n-x)}

Substitute n=7, p=0.63 and x=2 in the above formula.

P(x;p,n)=^7C_2(0.63)^2(1-0.63)^{(7-2)}

P(x;p,n)=\frac{7!}{2!5!}(0.3969)(0.37)^{5}\\P(x;p,n)=21(0.3969)(0.37)^{5}\\P(x;p,n)=0.0577974947199\\P(x;p,n)\approx0.057797

Hence, the probability is 0.057797

8 0
3 years ago
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