Question

Please help will fan and medal

Answer 1

The test scores for a math class are shown below.
83, 85, 82, 93, 83, 84, 95, 87, 86, 94
What is the standard deviation of the data set?
4.7

Answer 2

@jim_thompson5910 I need help againnn same type of problem

Answer 3

first you need to find the mean

mean = add up all the numbers then divide by 10

Answer 4

87.2?

Answer 5

@jim_thompson5910

Answer 6

yes

Answer 7

now subtract the mean from each data value

make a new column of these values

Answer 8

like subtract 87.2 from 83 and all the others?

Answer 9

yes like 83 - 87.2 = -4.2, and the same for the others

Answer 10

83, 85, 82, 93, 83, 84, 95, 87, 86, 94
---------------------------------
-4.2, -2.2, -5.2, 5.8, -4.2, -3.2, 7.8, -0.2, -1.2, 6.8

Answer 11

square each of those values

Answer 12

17.64, 4.84, 27.04, 33.64, 17.64, 10.24, 60.84, 0.04, 1.44, 46.24

Answer 13

now add up all of those values

Answer 14

219.6

Answer 15

divide that by 10 to get 21.96

Answer 16

then take the square root of that to get the standard deviation

Answer 17

this is considered the population standard deviation

Answer 18

Thank you!

Answer 19

yw

Answer 20

I have one last question but I don't really have time to do it so could you just show me this one?

Answer 21

In triangle RST angle S is a right angle and csc R = 17/15. What is tan T?
8/15

Answer 22

well if you don't have time, then you can come back later and I can help out

Answer 23

Can we work through it quickly right now?

Answer 24

csc R = 17/15



since csc = hyp/opp

Answer 25

find the length of leg SR and that will help you determine tan(T)

Answer 26

8?

Answer 27

@jim_thompson5910

Answer 28

yep 8

Answer 29

ok

Answer 30

then you use tan = opp/adj

Answer 31

Thank you!!!

Answer 32

yw