Question

The stem-and-leaf plot shows the heights in centimeters of Teddy Bear sunflowers grown in two different types of soil.

a) Describe the overlap of the two sets of data.

b) Calculate the mean of each data set.

c) Calculate the mean absolute deviation (MAD) of each data set.

d) Which set is more variable? How do you know?

Answer 1

ahh its been far too long since i've done statistics...

Overlap, as far as I remember, would just be the shared range of values between the two sets. In this case, both sets share the range of 51-83. set A goes higher, set B goes lower.

Mean I'm sure you can calculate yourself, just sum of all the numbers in a set divided by the number of numbers in that set.

Mean absolute deviation, once again is a lot of tedious math. Find the mean, then find the average distance that every number is from the mean (this sites good if you need more help: http://www.mathsisfun.com/data/mean-deviation.html )

and finally, which ever set has the higher Mean deviation would be more variable!

Good luck

Answer 2

aha! great explanation thanks ;)

Answer 3

Glad I could help!