if we have a group of values...1st we find its average..ie..'mean'..then we calculate each value's difeerence from the mean..then we will square each 'difference value'.then we devide total of sqared value by n or n-1..that is what variance...

friend

compare the relative adrantages and disadvantages of mean mediam and made

you are working for a bank.The bank manager wants to know the mean waiting time for all customers who visit this bank. she has asked you to estimate this mean by taking a sample . Briefly explain how you will conduct this study. assume the data set on waiting times for 10 customers who visit a bank. Then estimate the population mean. choose your own confidence level.

how can we find the expectation of any function of X?

Jennifer

I've been using this app for some time now. I'm taking a stats class in college in spring and I still have no idea what's going on. I'm also 55 yrs old. Is there another app for people like me?

Tamala

Serious

Hamza

yes I am. it's been decades since I've been in school.

Tamala

who are u

zaheer

is there a private chat we can do

Tamala

hello
how can I get PDF of solutions introduction mathematical statistics ( fourth education)
who can help me

a box contains a few red and a few blue balls.one ball is drawn randomly find the probability of getting a red ball if we know that there are 30 red and 40 blue balls in the box