Question

can someone help with statistics please

Answer 1

start with definition
what is mean and what is what is standard deviation?

Answer 2

maybe, just maybe your brain will pick up from the definition

Answer 3

do some actual work, even google the definition or use your book

Answer 4

stop being lazy

Answer 5

http://finedrafts.com/files/CUNY/math/statistics/

Answer 6

To find out the mean, you have to add all the numbers up and then divide it by the amount of numbers there are.

To find the standard deviation, you need to find the variance. To find the variance, you need to find the difference of the data from the mean. The difference will then be squared. You add up all of the squared numbers, and divide it by the amount of data sets there are. The standard deviation is just the square root of the variance.

Answer 7

can you please show how, ill understand better like that then reading.

Answer 8

pick one

Answer 9

stop being lazy

Answer 10

@nincompoop please go away. or i will report you

Answer 11

for kids
http://www.mathsisfun.com/data/standard-deviation.html

Answer 12

go report me then

Answer 13

enough spoon feeding lazy kids

Answer 14

For example, for the mean (for class A), you add up all the test results. Then you add those all up. You have to then divide the sum by the amount of data sets there are.

Answer 15

please show how @calculusxy

Answer 16

LAUGHING OUT LOUD wowwww

Answer 17

http://www.mathsisfun.com/data/standard-deviation.html

Answer 18

So we have all those numbers underneath Class A. So then you add the numbers all up. You got that straight?

Answer 19

ya

Answer 20

Since there are fifteen numbers (aka fifteen test results from the class) you divide the sum by fifteen. That will be your mean for class A.

Answer 21

wait my bad

Answer 22

mean = 79 for Class A
mean = 85.133 for Class B

Answer 23

correct?

Answer 24

@calculusxy