mean=(24 +25 +15 +19 +17)/5

SD=sqrt{[(24-mean)^2 +(25-mean)^2 +(15-mean)^2 +(19-mean)^2 +(17-mean)^2]/N}

where N=5 or 4 depending how your teacher has chosen to define it.

let m=mean of data set in Q1. Let the new data set be:2. Make up a set of five data items that has the same mean as the data set in question 1 but has asmaller standard deviation

m, m, m, m, m.

You should calculate the mean and standard deviation of this data set

yourself.

m+1000, m+1000, m-1000, m-1000, m.3. Make up a set of five data items that has the same mean as the data set in Question 1 but has alarger standard deviation

You should calculate the mean and standard deviation of this data set

yourself.

24+m, 25+m, 15+m, 19+m, 17+m.4.Make up a set of data items that has theas the data set in question 1 but has asame standard deviationdifferent mean.

You should calculate the mean and standard deviation of this data set

yourself.

RonL