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bixtya [17]
3 years ago
5

If X is a normal random variable with parameters µ = 10 and σ 2 = 36, compute

Mathematics
1 answer:
alex41 [277]3 years ago
6 0

Answer:

Step-by-step explanation:

Given that X is a normal random variable with parameters µ = 10 and σ 2 = 36,

X is N(10, 6)

Or z = \frac{x-10}{6}

is N(0,1)

a)  P(X > 5),

=P(Z>-0.8333)\\=0.7977

(b) P(4 < X < 16),

=P(|z|

(c) P(X < 8),

=P(Z

(d) P(X < 20),

=P(Z

(e) P(X > 16).

=P(Z>-0.6667)

= 0.2524

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In a study of weight gains by college students in their freshman year, researchers record the amounts of weight gained by random
Valentin [98]

Answer:

For this particular case they are interested on the amount of weight gained by randomly selecting some students, we need to remember that the weight can't be a discrete random variable since this random variable can take values on a specified interval and with decimals, so for this case the best conclusion is that we have  a continuous data set.

Step-by-step explanation:

Previous concepts

We need to remember that continuous random variable mans that the values are specified over an interval in the domain, so is possible to have decimal values for the possible outcomes of the random variable.

By the other hand a discrete random variable only can take integers for the possible outcomes of the random variable over the specified domain.

Solution to the problem

For this particular case they are interested on the amount of weight gained by randomly selecting some students, we need to remember that the weight can't be a discrete random variable since this random variable can take values on a specified interval and with decimals, so for this case the best conclusion is that we have  a continuous data set.

5 0
4 years ago
What is the graph of the function f(x) = the quantity of x squared plus 4 x minus 12, all over x plus 6 ? (1 point)
krek1111 [17]
X^2 + 4x -12 = (x+6)(x-2)

so
(x+6)(x-2)
---------------- = x - 2
x + 6

f(x) = x -2


because
if x = -6
then y = -6 - 2 = -8

(-6,-8) is the order pair
6 0
3 years ago
Sixty people are invited to a party
natka813 [3]

Answer:

Need more information. What do you mean "Sixty people are invited to a party" ?

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
For each sequence find the first four terms and the tenth term 3n-4
antoniya [11.8K]

Answer:

= 1, 2, 5, 8 and 26

Step-by-step explanation:

To find the first 4 terms, substitute n = 1, 2, 3, 4 into the formula

a₁ = 3(1) - 4 = 3 - 4 = - 1

a₂ = 3(2) - 4 = 6 - 4 = 2

a₃ = 3(3) - 4 = 9 - 4 = 5

a₄ = 3(4) - 4 = 12 - 4 = 8

The first 4 terms are

- 1, 2, 5, 8

Substitute n = 10

a₁₀ = 3(10) - 4 = 30 - 4 = 26

3 0
3 years ago
Read 2 more answers
Consider triangle ABC. The legs have a length of 5 units each. Triangle A B C is shown. Angle A C B is a right angle. The length
kobusy [5.1K]

Answer:

Hypotenuse = 5√2 units

Step-by-step explanation:

Triangle ABC:

The legs are 5 units each

Opposite = 5unit

Adjacent = 5unit

Triangle ACB:

lengths of sides A C and C B are 5

The legs are 5 units each

Leg =AC = Opposite = 5unit

Leg = CB = Adjacent = 5unit

The hypotenuse for both ∆ACB is unknown. Since ∆ACB is a right angled triangle, we would apply Pythagoras theorem to find the hypotenuse.

Using Pythagoras theorem:

Hypotenuse ² = opposite ² + adjacent ²

Hypotenuse ² = leg² + leg²

AB = hypotenuse in ∆ACB

AB² = 5² + 5²

AB² = 25+25 = 50

AB = √50 = √(25×2)

AB = 5√2

Hypotenuse = 5√2 units

8 0
3 years ago
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