Complete the chart to find the mean,variance,and standard deviation. 45 340 400 825

Mathematics

1 answer:

hoa [83]3 years ago

7 0

Answer:

A. Mean = 402.5

B. Variance = 77,556.25

C. Standard Deviation = 278.49

Step-by-step explanation:

Let's calculate the mean, variance and standard deviation of the set of numbers given:

A. Mean = (45 + 340 + 400 + 825)/4 = 1,610/4 = 402.5

B. Variance [(45 - 402.5)² + (340 - 402.5)² + (400 - 402.5)² + (825 - 402.5)²]/4 = [(127,806.25 + 3,906.25 +6.25 + 178,506.25/4 = 77,556.25

C. Standard Deviation = √Variance = √77,556.25 = 278.49

You might be interested in

The value of (a–1)+92 - +24,5 " when a= 2 and b=-1

Andre45 [30]

Answer:

256271

Step-by-step explanation:

6165253-6728282-289292

3 0

2 years ago

Please Help ASAP Here is the question

s344n2d4d5 [400]

Answer:

theres no question all it says is

Step-by-step explanation:

Please Help ASAP

Here is the question

3 0

2 years ago

Three groups of a number plus two.

Jet001 [13]

3x+2
of means multiply

8 0

2 years ago

A number n plus 7 is less than or equal to 9

devlian [24]

N ≤ 2, if n plus 7 is less than or equal to 9 (n+7 ≤ 9) then carry the 7 over to create n ≤ 9-7 giving the answer n ≤ 2 (n less than or equal to 2)

7 0

2 years ago

the sum of two numbers is 3 3/4 if 1/3 of the larger number is 1/2 more than 2/3 of the smaller find the number

Agata [3.3K]

Let us assume the larger number = x
Let us assume the smaller number = y
Then
x + y = 3 3/4
x + y = 15/4
And
x/3 = (2y/3) + 1/2
x = [3 * (2y/3)] + (3/2)
= 2y + (3/2)
Now putting the value of x from the second equation to the first , we get
x + y = 15/4
2y + (3/2) + y = 15/4
3y = (15/4) - (3/2)
3y = (15 - 6)/4
3y * 4 = 9
12y = 9
y = 9/12
   = 3/4
Now putting the value of y in the first equation, we get
x + y = 15/4
x + (3/4) = (15/4)
x = (15/4) - (3/4)
   = (15 - 3)/4
   = 12/4
   = 3
So the value of x or the larger number is 3 and the value of y or the smaller number is 3/4.

3 0

2 years ago