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kompoz [17]
3 years ago
14

What is the mean of 23,25,24,26,23,25,22,22,23,40

Mathematics
2 answers:
TiliK225 [7]3 years ago
8 0
To find the mean add all numbers than divide by quantity

all numbers added give = 253

mean = 253/ 10 = 25.3

mean = 25.3

:)
bekas [8.4K]3 years ago
5 0
To find the mean you first have to add all of your numbers together. Once you find the answer, you divide by how many numbers you added together to in this case it would be 10 numbers. When you add the numbers together you get 253. When you divide by 10, you get 25.3. Therefore your answer is 25.3! Hope this helped!
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What is the solution of 3x + y = 9 and 3x − 5y = 15?
allochka39001 [22]
The answer is (10/3, -1)
7 0
3 years ago
Which of the value of x satisfies the equation below -2x-7=12
Masteriza [31]
Answer is A.
You start by adding the 7 to the opposite side. Giving you 19. You divide both sides by -2 which gives you x on one side and -9.5 on the other.

-2x-7=12
-2x=12(+7)
-2x=19
x=19/-2
x=-9.5
8 0
2 years ago
It takes 1/2 cup of flour to bake 2 dozen cookies how many cups of flour are needed to bake enough cookies for 36 people to have
Olegator [25]

Answer:

72

Step-by-step explanation:

36 x 2 = 72

To check your answer:

72 / 2 = 36

5 0
3 years ago
2. To estimate the mean age for a population of 4000 employees, a simple random sample of 40 employees is selected. a. Would you
ANEK [815]

Answer:

Step-by-step explanation:

a.

Size of the population, N = 4000

Size of the sample, n = 40

n/N = 40/4000 = 0.01

0.01 is less than 0.05 and hence we would not us the finite population correction factor in calculating the standard error of the mean.

b.

Population standard deviation is σ = 8.2

<u>So, the standard error of x’ using the finite population correction factor is give by</u>

σ(x’) = √[(N - n)/(N - 1)] x (sigma/√n)

σ(x’) = √[(4000 - 40)/(4000 - 1)] x (8.2/√40)

σ(x’) = 1.29

<u>Standard error of x’ without using the finite population correction factor is</u>

σ(x’) = σ/√n

σ(x’) = 8.2/√40 = 1.2965

<u>There is little difference between the two values of the standard error. So we can ignore the population correction factor.</u>

c.

Let the population mean be μ

Probability that the sample mean will be within =-2 of the population mean is

P(μ– 2 < x’ < μ + 2)

At x’ = μ – 2 , we have

z = (μ – 2 – μ)/1.2965

z = -1.54

at x’ = μ  + 2, we have

z = (μ + 2 – μ)/1.2965

z = 1.54

<u>So the required probability is </u>

P(μ – 2 < x’ < μ + 2) = p(-1.54< z < 1.54)

P(μ – 2 < x’ < μ + 2) = p(z < 1.54) – p(z < -1.54)

P(μ – 2 < x’ < μ + 2) = 0.9382 – 0.0618

P(μ – 2 < x’ < μ + 2) = 0.8764

7 0
3 years ago
Find (a) the slope of the curve at the given point P, and (b) an equation of the tangent line at P: y = 9x^2 + 5 ; P (2,41)
Flauer [41]

Answer:

(a) 36

(b) y = 36x-31

Step-by-step explanation:

(a) dy/dx = 18x

slope of tangent at (2, 41) = 18(2)

= 36

(b) using y-y1 = m(x-x1)

y-41 = 36(x-2)

y = 36x-31

6 0
3 years ago
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