Question

what is the standard deviation rounded to the nearest 10th?

Answer 1

(52.1,45.5,51,48.8,43.6)

Answer 2

sorry guys im terrible with standard deviation lol

Answer 3

((11668.06/5) - (48.2) square ) sqrt

Answer 4

my answer choices are 3.2, 6.9, 10.3 and 10.4

Answer 5

3.2

Answer 6

ok but how? i want to learn how to find it

Answer 7

i also have one more i did by myself but im not sure if its right

Answer 8

56, 78, 123, 34, 67, 91, 20


my answers are

32.1
32.2
67.0
67.1

i got 32.2

Answer 9

There's a formula for standard deviation

Answer 10

i know it has steps but i got confused

Answer 11

Sqrt (sigma x square / n - mean square)

Answer 12

As for your question refer to I grouped data formula for s.d.

Answer 13

thats right?

Answer 14

http://www.emathzone.com/tutorials/basic-statistics/standard-deviation.html

Answer 15

Refer to the first.

Answer 16

ok

Answer 17

First you square each of all your numbers, then plus up all together and decide by the number of data you have.

Answer 18

Find your mean and square it. Mean is total data. Over number of data.

Answer 19

Take the first step minus the mean square.

Answer 20

i got 32.18695 but i rounded it and got 32.2

Answer 21

Lastly squareroot your answer.

Answer 22

because i got 67 as the mean

Answer 23

Your answer is correct bingooo! :)

Answer 24

yay!! :) thanks

Answer 25

No problem. :))

Answer 26

i have 1 more but i dont think it has to do with standard deviation

Answer 27

given the mean of 7.6 and a standard deviation of 3.1, within how many standard deviations of the mean do the values 10,9,11,5, and 3 fall?

Answer 28

i dont understand at all how to do this lol

Answer 29

the answers are 0,1,2,and 3

Answer 30

i was going to use the z-score but i dont think i can

Answer 31

@LXelle

Answer 32

if the mean is 7.6 the 1 standard deviation from the mean is

lower bound =7.6 - 3.1 and Upper bound = 7.6 + 3.1

so if a number is between 4.5 and 10.7 it is within 1 standard deviation of the mean.

2 standard deviations

lower bound = 7.6 - 2 x 3.1 = 1.4 Upper bound = 7.6 + 2 x 3.1 13.8

so the boundary for 2 standard deviations are 1.4 to 4.5 then 10.7 to 13.8

so look at each number individually 10... between 4.5 and 10.7 so 1 SD
9 be

Answer 33

so its 1?

Answer 34

9 between 4.5 and 10.7 so 1 SD
Then keep going on. Yes you're right.

Answer 35

so i have 4.5 and 10.7 to take each number and see if they fall in the middle?

Answer 36

nvm because then 11 and 3 wouldnt fit and it would be 0