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Elanso [62]
3 years ago
15

How do u write the problem

Mathematics
1 answer:
mr Goodwill [35]3 years ago
4 0
I don’t know ‍♀️ I am very sorry
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A true-false quiz with 10questions was given to a statistics class. Following is the probability distribution for the score of a
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Using the mean <u>formula and it's interpretation</u>, it is found that:

1. The mean is 7.52.

2. If we were to give this quiz to more and more students, the mean score for these students would approach 7.52.

The mean of a discrete distribution is given by the <u>sum of each outcome divided by it's respective probability</u>.

Hence, in this problem, according to the <u>distribution given</u>, the mean is:

E(X) = 5(0.06) + 6(0.12) + 7(0.33) + 8(0.29) + 9(0.13) + 10(0.07) = 7.52

The mean is 7.52.

The <em>interpretation </em>is that over many trials, the mean would approach 7.52.

A similar problem is given at brainly.com/question/24855677

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3 years ago
For the function f(x) = -x^3 + 2x^2 + x - 2
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Answer:

Step-by-step explanation:

a)

f(1)=-1^3+2*1^2+1-2=-1+2+1-2=0\\\\

b)

Rationnel roots are divisor of -2: -1,1,-2,2

f(-1)=-(-1)^3+2*(-1)^2+(-1)-2=1+2-1-2=0\\\\\begin{array}{c|cccc}&x^3&x^2&x&1\\---&---&---&---&---\\&-1&2&1&-2\\x=1&&-1&1&2\\&-1&1&2&0\\\\x=-1&&1&-2\\&-1&2&0\\---&---&---&---&---\\\end {array}\\\\\\f(x)=-x^3+2x^2+x-2=(x-1)(x+1)(-x+2)\\\\

c) see picture

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3 years ago
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The answer is option 7
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you have piano lessons every fourth day and guitar lessons every sixth day. Today you have both lessons. In how many days will y
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In twelve days four and six both go into 12
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Help me please this is due today :((<br> Show all work for it pleaseee
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Answer:

Length C, B= 90 mi

Step-by-step explanation:

The small square in the corner in any shape always represent 90°

<em>Hope it helps!!</em>

5 0
2 years ago
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