Answer:
The standard deviation is used in conjunction with the mean to numerically describe distributions that are bell shaped. The mean measures the center of the distribution, while the standard deviation measures the spread of the distribution.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by

The mean is the average value of the measures while the standard deviation measures how spread the measures are from the mean. So
The standard deviation is used in conjunction with the mean to numerically describe distributions that are bell shaped. The mean measures the center of the distribution, while the standard deviation measures the spread of the distribution.
Answer:
9
in²
Step-by-step explanation:
The area (A) of an equilateral triangle is calculated as
A =
( s is the length of a side )
Here s = 6, thus
A =
=
= 9
in²
The width of rectangle is
and length is 
Step-by-step explanation:
Let,
Width of rectangle = w
Length of rectangle = w+
Perimeter of rectangle = 
Perimeter of rectangle = 2(Length + Width)

Subtracting
from both sides

Dividing both sides by 4

Therefore,
Width of rectangle = w =
cm
Length of rectangle = 
The width of rectangle is
and length is 
Keywords: perimeter, addition
Learn more about addition at:
#LearnwithBrainly
Answer:
5/9
Step-by-step explanation:
complement means not choosing an orange
P( not choosing orange) = (apple and fruit) / total
= (4+6) / (4+6+8)
=10/18
= 5/9
I cannot see it all is their something you could do to help me help you?