The college board states that the average math sat score is 514 with a standard deviation of 117. colleen gathered data from 50 students in her graduating class and found the average score to be 529. she thinks that her class’s math sat score is different from the average. which of the following shows the correct z-statistic for this situation?
a. 0.38
b. 0.91
c. 1.26
d. 5.26

The solution would be like this for this specific problem:

Mean 1: 529
Mean 2: 514
ST: 117

529 - 514 = 15
15 / 117 = .13

I hope this helps and if you have any further questions, please don’t hesitate to ask again. 

B. 0.91

Step-by-step explanation:

The College Board states that the average math SAT score is 514 with a standard deviation of 117. Colleen gathered data from 50 students in her graduating class.

She found the average score to be 529.

We know that,

Here,

x = 529,

μ = 514,

σ = 117,

n = 50,

Putting the values,

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation: