The result of 146 chemical reactions gave yields with a standard deviation of 4.864 mol.
What is the standard error of the mean?
Select one:
a. SE = 0.403 mol
b. SE = 0.015 mol
c. SE = 0.033 mol
d. SE = 0.162 mol
e. SE = 23.658 mol
f. SE = 4.864 mol

a. SE = 0.403 mol

Step-by-step explanation:

The standard error of the mean, is the standard deviation of means of means.

It is calculated using,

We have the standard deviation to be

and the sample size is n=146.

We substitute the values to get:

We approximate to three decimal places to get:

with btw u said 100pts but it clearly says

i answerd and just got 10pts

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system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.