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Nadya [2.5K]
3 years ago
15

Answer this question…………

Mathematics
2 answers:
Paladinen [302]3 years ago
5 0
The third option is the answer
Korolek [52]3 years ago
5 0
I think it's the 3rd one
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The distribution of heights for adult men in a certain population is approximately normal with mean 70 inches and standard devia
KengaRu [80]

Answer:

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12]

Step-by-step explanation:

I beleive those options corresponds to another question, i will ignore them. We want to know an interval in which the probability that a height falls there is 0.8.

In such interval, the probability that a value is higher than the right end of the interval is (1-0.8)/2 = 0.1

If X is the distribuition of heights, then we want z such that P(X > z) = 0.1. We will take W, the standarization of X, wth distribution N(0,1)

W = \frac{X-\mu}{\sigma} = \frac{X-70}{4}

The values of the cumulative distribution function of W, denoted by \phi , can be found in the attached file. Lets call y = \frac{z-70}{4} . We have

0.1 = P(X > z) = P(\frac{X-70}{4} > \frac{z-70}{4}) = P(W > y) = 1-\phi(y)

Thus

\phi(y) = 1-0.1 = 0.9

by looking at the table, we find that y = 1.28, therefore

\frac{z-70}{4} = 1.28\\z = 1.28*4+70 = 75.12

The other end of the interval is the symmetrical of 75.12 respect to 70, hence it is 70- (75.12-70) = 64.88.

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12] .

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8 0
3 years ago
Help me with this please
KiRa [710]
No pongas foto por que no puedo ver y no te puedo responder
7 0
3 years ago
What is 22 percent of 50
Lady_Fox [76]
Translate
'what' means unknown or find this or ?
'is' means = or equals
22%
'of' means multiply
50

percent means parts out of 100
x%=x/100 so 22%=22/100

so

what is 22% of 50 means
?=22/100 times 50
?=1100/100
?=11
answer is 11

the hack, is to recognize that 50 is 1/2 of 100, so 22% of 1/2 of 100 is 22/2=11


answe ris 11


5 0
3 years ago
Read 2 more answers
Determine whether the following relation is a function. {(-6, – 8), (5, 1). (9.-4), (7,2), (15, 0)} ​
lidiya [134]

This relation is a function. None of the x-values repeat. Each y-value belongs to a specific x-value.

4 0
3 years ago
What is 99.99/72? Plz help ASAP!
Minchanka [31]

Answer:

1.38875. Please mark as brainliest.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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