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castortr0y [4]
2 years ago
8

A random sample of size 16 is to be taken from a normal population having mean of 100 andvariance 4. What is the 90th percentile

of the distribution of x?
Mathematics
1 answer:
viva [34]2 years ago
3 0

Answer:  100+1.28(1/2)=100.64

Step-by-step explanation:

A random sample of size 16 is to be taken from a normal population having mean 100 and variance 4. ... The 90th percentile of the normal curve, according to the table I was provided, was equal to 1.28 standard units above the mean.

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Which statements are true? Select all that apply. If a line segment is divided into smaller adjacent segments, the sum of the le
Licemer1 [7]

Answer:

yes

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4 0
2 years ago
Simplify the following expression below:
IrinaK [193]
So, 4/3 - 2i

4/3 - 2i = 12/13 + i8/13

multiply by the conjugate: 
3 + 2i/3 + 2i
= 4(3 + 2i)/(3 - 2i) (3 + 2i)
(3 - 2i) (3 + 2i) = 13

(3 - 2i) (3 + 2i)

apply complex arithmetic rule: (a + bi) (a - bi) = a^2 + b^2
a = 3, b =  - 2
= 3^2 + (- 2)^2

refine: = 13
= 4(3 + 2i)/13

distribute parentheses:
a(b + c) = ab + ac
a = 4, b = 3, c = 2i
= 4(3) + 4(2i)

Simplify:
4(3) + 4(2i)
12    +    8i


4(3) + 4(2i)
Multiply the numbers: 4(3) = 12
= 12 + 2(4i)

Multiply the numbers: 4(2) = 8
= 12 + 8i


   12 + 8i
= 12 + 8i/13

Group the real par, and the imaginary part of the complex numbers:


Your answer is: 12/13 + 8i/13





Hope that helps!!!
7 0
2 years ago
If ƒ(x ) = 3x + 1 and ƒ -1 = , then ƒ -1(7) =
Elden [556K]
F(x) = 3x + 1

let f(x) = y

y = 3x + 1

y - 1 = 3x

3x = y - 1

x = (y - 1)/3

From y = f(x),  x = f⁻¹(y) 

<span>x = (y - 1)/3
</span>
 f⁻¹(y)  = (y - 1)/3

f⁻¹(7)  = <span>(7 - 1)/3 = 6/3 = 2

</span>f⁻¹(7)<span> = 2</span>
6 0
2 years ago
Ms wilson surveyed her class of 36 students about their favorite icecream flavors. Two thirds preferred chocolate. One fourth pr
mafiozo [28]
Answer- 9 students preferred vanilla
Hope this Helps! :)
3 0
3 years ago
Read 2 more answers
В рулоне 32 метров ткани. Отрезали одну восьмую часть. Сколько
chubhunter [2.5K]

Answer:

28 meters

Step-by-step explanation:

<u><em>The question in English is</em></u>

On a 32-meter roll of fabric, it cuts an eighth of the total. How many meters of fabric are left in a roll?

step 1

we know that

To find out how many meters of fabric were cut, multiply the total meters by the fraction that was cut

32(\frac{1}{8})=4\ m

step 2

To find out how many meters of fabric are left, subtract the meters of fabric that were cut from the total meters of fabric

so

32-4=28\ m

6 0
3 years ago
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