1. If a set of data has a standard deviation of 3 and a mean of 12. What is the value at z=2?
2. If a set of data has a standard deviation of 3 and a mean of 12. What is the value at z=0?
3. The interquartile range of the data set {5,6,7,7,9,13,15,17,18,18,19,20,32} is
4. If a set of data has a standard deviation of 3 and a mean of 12. What is the value at z=-1?
PLEASE HELP thank you
You can play around with Z table stuff at
davidmlane.com/hyperstat/z_table.html
as for #3,
the median is 15
the median of the bottom 6 values is 7
the median of the top 6 values is 18.5
so the IQR is 18.5 - 7 = 11.5