Question

In a neighborhood donut shop, One type of donut has 490 calories, Three types of donuts have 520 calories, Three types of donuts have 360 calories, five types of donuts have 350 calories, and four types of donuts have 390 calories.

Find the standard deviation round answer to the nearest 10th


Can I please have some help

Answer 1

add: 490 + 3(520) + 3(360) + 5(350) + 4(390) , then divide by 16
this will be your average or mean (I had 402.5)
now for each data value, take (mean - number), square it then add up those squares
e.g. for the 350 : 402.5-350 = 52.5
52.5^2 = 2756.25 <--- you will have 5 of those, so just multiply it by 5

add up those 16 squares
divide by 16, then take the square root

let me know what you got