2 years ago

Please help............ what is the formula of calculating variance??

Mathematics

1 answer:

natta225 [31]2 years ago

6 0

Answer and Step-by-step explanation:

Hello!

To calculate variance, we start by calculating the mean, or average of your question. Then, we subtract the mean from each data point, and square the differences. Next, we add up all the squared differences. Now, the last step is to divide The sum by n minus 1, where n equals the total number of data points from your question!

Hope this helps you!

Hugs,

Josh

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How much greater is 28.95 than 14.25?

patriot [66]

28.95 is 14.7 greater than 14.25

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2 years ago

If a car has tires with a diameter of 28 inches and is traveling at 55 mph, how fast are its tires spinning, in rpm^ prime s (re

Aleksandr-060686 [28]

Answer:

The tires are spinning at 660.49 revolutions per minute.

Step-by-step explanation:

The speed of the tires (v) is the same that the speed of the car, so to find the angular velocity of the tires we need to use the equation:

$\omega = \frac{v}{r}$

Where:

r: is the radius of the tires = d/2 = 28 inches/2 = 14 inches

$\omega = \frac{55 mph}{14 inches*\frac{1 mile}{63360 inches}} = 2.49 \cdot 10^{5} \frac{rad}{h}*\frac{1 h}{60 min}*\frac{1 rev}{2\pi rad} = 660.49 rpm$