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Brilliant_brown [7]
3 years ago
5

STATS. How can we decide if an event that seems weird is actually unusual or fairly likely?

Mathematics
1 answer:
lukranit [14]3 years ago
7 0

Answer:

Try finding the theoretical probability of a sample space before calling the event in the sample space "weird"

Step-by-step explanation:

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Suppose that the probability that a person will develop hypertension over a life time is 60%. Of 13 graduating students from the
Savatey [412]

Answer:

The mean number of the students who develop hypertension over a life time is 7.8.

Step-by-step explanation:

For each person, there are only two possible outcomes, either they will develop hypertension, or they will not. The probability of a person developing hypertension is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x successes on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

Suppose that the probability that a person will develop hypertension over a life time is 60%.

This means that p = 0.6

13 graduating students from the same college are selected at random.

This means that n = 13

Find the mean number of the students who develop hypertension over a life time

E(X) = np = 13*0.6 = 7.8

The mean number of the students who develop hypertension over a life time is 7.8.

5 0
2 years ago
Determine whether the polynomial is a difference of squares and if it is, factor it. y^2 – 196
Lena [83]
Yes....(y-14)(y+14).....................
8 0
3 years ago
Find the two consecutive even integers whose sum is -118
adell [148]

Answer:

this is your answer. thanks!!

7 0
3 years ago
Find the inverse of<br><br> f(x) = -6xˆ2 + 24x - 100
monitta

Answer:

See below

Step-by-step explanation:

y = -6x^2 + 24x-100

solve for 'x'

y + 100 =   -6x^2 + 24x   = -6(x^2-4x)    complete the square for x

(y+100) /(-6 ) =    (x-2)^2 -4                     add 4 to both sides

(y+100)/(-6) +4   = (x-2)^2                       sqrt both sides

sqrt [  ( y+100)/(-6) + 4  ]  + 2 = x           change  x and y

y = ± sqrt [ (x+100)/(-6) + 4 ] + 2            simplify (if needed)

<u>y  = ± sqrt( -x/6 -12.666)  + 2 </u>

5 0
2 years ago
Show that xcosec^2x = cotx - d/dx xcotx
Mama L [17]

The given equation, x.cosec²x = cot x - d/dx x.cot x, is proved using the product rule of differentials.

In the question, we are asked to show that x.cosec²x = cot x - d/dx x.cot x.

To prove, we go by the right-hand side of the equation:

cot x - d/dx x.cot x.

We solve the differential d/dx using the product rule, according to which, d/dx uv = u. d/dx(v) + v. d/dx(u), where u and v are functions of x.

cot x - {x. d/dx(cot x) + cot x. d/dx(x)}

= cot x - {x. (-cosec²x) + cot x} {Since, d/dx(cot x) = -cosec²x, and d/dx(x) = 1}

= cot x + x. cosec²x - cot x

= x. cosec²x

= The left-hand side of the equation.

Thus, the given equation, x.cosec²x = cot x - d/dx x.cot x, is proved using the product rule of differentials.

Learn more about differentials at

brainly.com/question/14830750

#SPJ1

4 0
2 years ago
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