Answer:
Mean = 32.8
Step-by-step Explanation:
Mean is given as Mean = (Σfx)/Σf
First, find the mid-point, x, of each class, and multiply by the frequency (f) of the class to get fx:
Class ==> f ==> x ==> fx
0-10 => 3 => 5 => 15
10-20 => 8 => 15 => 120
20-30 => 10 => 25 => 250
30-40 => 15 => 35 => 525
40-50 => 7 => 45 => 315
50-60 => 4 => 55 => 220
60-70 => 3 => 65 => 195
Sum the fx of all classes together to get Σfx:
Σfx = 15 + 120 + 250 + 525 + 315 + 220 + 195 = 1,640
Σf = 3 + 8 + 10 + 15 + 7 + 4 + 3 = 50
(Σfx)/Σf =
(Σfx)/Σf =
Mean = 32.8
Answer:
do 11X40
Step-by-step explanation:
its just how it works
It has one solution which is z=4
Answer:
2.02 may be I thinks tell me if it's right
We can do this in a few steps.
First: If it is 300 ounces per second then how many pounds per second?
1 ounce is 1/16 of a pound.
So we multiply 300 by 1/16.
300 x 1/16 = 300 ÷ 16 = 18.75
Now we know: 300 oz/sec equals 18.75 lbs/sec
But, we want to know how many lbs per minute (lbs/sec)
We need to calculate how many seconds are in a minute.
1 minute = 60 seconds.
We know how many lbs per second.
If we want to know how many lbs per minute, we multiply # of pounds per seconds by 60.
# pounds per second x 60 = # pounds per minute
# pounds per second: 18.75
18.75 x 60 = # lbs/min
18.75 x 60 = 1125
This means that 300 oz/sec => 1125 lbs/min
Comment: Wow, you have at least 390 math problems. That is insane! I've never had to do "the 390th math problem"!