Answer:
Mean is 35.
Median is 28.
Hope this helps!
Step-by-step explanation:
Answer:
A) What was the absolute change from 1970 to 1990?
in 1970 we had $87.32
in 1990 we had $283.16
The absolute change is the direct difference:
$283.16 - $87.32 = $195.84
B) What was the relative change from 1970 to 1990?
Now we need to compare this with the initial value:
Relative change = 100%*(final value - initial value)/initial value.
Relative change = 100%*$195.84/$87.32 = 223.93%
C) What was the absolute change from 1995 to 2000?
in 1995 the price was $351.94
in 2000 the price was $349.69
The absolute change is:
$349.69 - $351.94 = -$2.25
The negative sign means the obvious thing, the price decreased.
D) What was the relative change from 1995 to 2000?
Relative change = 100%*(-$2.25)/($351.94) = -0.64%
Answer: range= 26, variance= 80 and standard deviation= 8.94
Step-by-step explanation:
Range = highest - lowest
Range = 146 - 120
Range= 26
Let m be mean
M=mean=sum/n
Mean=(120+134+146+127+138+133) / 6
M=798/6
M=133
The standard deviation sample formula:
S.D = sqrt( Summation of |x-m|^2 / n-1)
Let start finding:
|x-m|^2
For 1st: |120-133|^2=169
For 2nd: |134-133|^2=1
For 3rd: |146-133|^2=169
For 4th: |127-133|^2=36
For 5th: |138-133|^2=25
For 6th: |133-133|^2=0
Summation of |x-m|^2 = 400
The standard deviation formula is :
S.D = sqrt( Summation of |x-m|^2 / n-1)
S.D= sqrt(400 / 5)
S.D=sqrt(80)
S.D= 8.94
Variance = (Summation of |x-m|^2 / n-1)
Variance= 400/5
Variance= 80
