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miskamm [114]
3 years ago
13

What is the first error he made in computing the standard deviation?

Mathematics
2 answers:
artcher [175]3 years ago
7 0
B.yuri divided by n instead of n-1
vivado [14]3 years ago
6 0

Answer:

Step-by-step explanation:

Given is a sample with 4 items as

12,9,14,21

Mean = average of 4 = 14

s is the square root of sample variance

Sample variance is the sum of squares divided by n-1

But Yuri divided by 4 = n instead of 3 = n-1

That is the only mistake he did and all other steps are right.

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What is a random variable
Brrunno [24]

Answer:

Check Below.

Step-by-step explanation:

In  Probability/ Statistics in simple terms it is a variable which possess the following characteristics within a sample space: 1) Their values are defined within the set of Real Numbers, i.e. it is a Quantitative variable. 2) It is possible to calculate its probability.

6 0
2 years ago
15/9 =25/9x<br><br> I simplified it as much as I could but i'm stuck here:/
kvv77 [185]

Answer:

Step-by-step explanation:

We move all terms to the left: 15/9-(25/9x)=0 Domain of the equation: 9x)!=0 x!=0/1 x!=0 x∈R

We add all the numbers together, and all the variables

-(+25/9x)+15/9=0

We get rid of parentheses

-25/9x+15/9=0

We calculate fractions

=0 x=0/1 x=0

i hope helps you and if you want you can give me a brainly crown only if you want

4 0
3 years ago
Read 2 more answers
Find the percent change.<br> Original amount: 16<br> New amount: 11
marishachu [46]
The exact answer is 31.25%, or about 31%

8 0
3 years ago
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Passes through (1,12) and has a vertex (10,-4)
agasfer [191]

Answer: 16/81 (x-10)^2 -4

Step-by-step explanation:

To write a vertex equation with just a point and the vertex, you have to figure out the variables.

In vertex form, the equation is y = a (x-h)^2 + k

Your y is 12, x = 1, h = 10, and k = -4

Plug everything into equation

12 = a (1 - 10)^2 -4

12 = a (-9)^2 - 4

12 = 81a - 4

16 = 81a

16/81 = a

Now you know what the 'a' value is.

If you graph 16/81 (x-10)^2 -4 , you will get a point at (1,12) and a vertex of (10,-4)!

I hope this helps!

3 0
3 years ago
Write the following as a fraction in simple form <br><br>1.6​
mestny [16]
Hi!
im not really sure what the answer is but i got 1 3/5
hope that helps!
7 0
3 years ago
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