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1.Find the mean and the standard deviation of this set of data.
24, 25, 15, 19, 17
2. Make up a set of five data items that has the same mean as the data set in question 1 but has a smaller standard deviation
3. Make up a set of five data items that has the same mean as the data set in Question 1 but has a larger standard deviation
4.Make up a set of data items that has the same standard deviation as the data set in question 1 but has a different mean.
Thank you SOO MUCH!:D
mean=(24 +25 +15 +19 +17)/5Quote:
Originally Posted by baby_pinoy56
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:Quote:
2. Make up a set of five data items that has the same mean as the data set in question 1 but has a smaller 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.Quote:
3. Make up a set of five data items that has the same mean as the data set in Question 1 but has a larger 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.Quote:
4.Make up a set of data items that has the same standard deviation as the data set in question 1 but has a different mean.
You should calculate the mean and standard deviation of this data set
yourself.
RonL