Given:
μ = 25 mpg, the population mean
σ = 2 mpg, the population standard deviation
If we select n samples for evaluation, we should calculate z-scores that are based on the standard error of the mean.
That is,

The random variable is x = 24 mpg.
Part (i): n = 1
σ/√n = 2
z = (24 -25)/2 = -0.5
From standard tables,
P(x < 24) = 0.3085
Part (ii): n = 4
σ/√n = 1
z = (24 -25)/1 = -1
P(x < 24) = 0.1587
Part (iii): n=16
σ/√n = 0.5
z = (24 - 25)/0.5 = -2
P(x < 24) = 0.0228
Explanation:
The larger the sample size, the smaller the standard deviation.
Therefore when n increases, we are getting a result which is closer to that of the true mean.
Answer:
x^2 + 6x + 8
Step-by-step explanation:
area of blue = x^2
area of pink= 2x
area of green=4x
area of brown=8
Adding all the area.
we get : x^2 + 6x +8
Answer:
15
Step-by-step explanation:
n + 6
for
n = 9
then:
9 + 6 = 15
Answer:
Option 'b' and 'e' are equivalent.
Step-by-step explanation:
Given : Expression 
To find : Which equations are equivalent to expression ?
Solution :
a) 
It is not equivalent.
b) 
It is equivalent.
c) 
It is not equivalent.
d) 
It is not equivalent.
e) 
It is equivalent.
1. -0.27 goes on the inside because it is the dividend.
2. -0.9 goes on the outside because it is the divisor.
I am 99.9% sure this is correct, but if I am wrong, then I am greatly sorry, and I hope you will for give.