Answer:

Using the frequency distribution, I found the mean height to be 70.2903 with a standard deviation of 3.5795
Step-by-step explanation:
Given
See attachment for class
Solving (a): Fill the midpoint of each class.
Midpoint (M) is calculated as:

Where
Lower class interval
Upper class interval
So, we have:
Class 63-65:

Class 66 - 68:

When the computation is completed, the frequency distribution will be:

Solving (b): Mean and standard deviation using 1-VarStats
Using 1-VarStats, the solution is:


<em>See attachment for result of 1-VarStats</em>
Answer:
x = 5
Step-by-step explanation:
2(x+6) = 22
2x+12 = 22
2x = 10
x = 5
Answer:
18.04 gallons
Step-by-step explanation:
The cost of filling the empty tank of the vehicle is $71.98.
If each gallon of gas costs $3.99, then we have to find the volume of the sedan's tank in gallons.
Now, $3.99 is the cost of 1 gallon of gas.
Hence, $71.98 will be the cost of
gallons.
Therefore, the volume of the tank is 18.04 gallons. (Answer)
Answer:
30/100 *200/1= 6000/100=60