So the mean is 72.97
We need to subtract the mean from each value and square it.
(65-72.97)^2= 63.5209
(68-72.97)^2=24.7009
(69-72.97)^2=15.7609
(70-72.97)^2=8.8209
(71-72.97)^2= 3.8809
(72-72.97)^2=0.9409
(90-72.97)^2=290.0209
(95-72.97)^2=485.3209
Now we add up the new values ( also consider their frequency) and find their mean.
Add the values
63.5209+(2 •24.7009=49.4018)+(5•15.7609=78.8045)+(8•8.8209=70.5672)+(7•3.8809=27.1663)+(3•0.9409=2.8227)+(2•290.0209=580.0418)+(2•485.3209=970.6418)= 1,842.967
Divide by total numburs to find the mean
1,842.967/ 30=61.43223333
The standar deviation is the square root of the mean so is
Square root of 61.43223333=7.837871735
Round to the nearest tenth
Standard Deviation is 7.8
Answer:
x > -1
Step-by-step explanation:
Divide the whole inequality by 9.
(
+1)>
Subtract 1.
> 
- 1
> -
Multiply by 3.
x > -1
Answer:
36 inch
Step-by-step explanation:
Answer:
The answer is D
Step-by-step explanation:
5 over 9 would be located in between 0.75 and 8 over 9
2/3 as a decimal is 0.66/0.6, 7/6 as a decimal is 1.16, 1/8 as a decimal is 0.125, and 9/10 as a decimal is 0.9
I guess you could put those in least to greatest order. I hope this helped !!
