Since 1995, blue M&M® candies replaced tan with
30% brown, 20% yellow, 20% red, 10% orange, 10% green, and 10% blue
candies to be expected, on average.
"While we mix the colors as thoroughly as possible, the above ratios
may vary somewhat, especially in the smaller bags. This is because we
combine the various colors in large quantities for the last production
stage (printing). The bags are then filled on high-speed packaging
machines by weight, not by count. Each student will need to purchase
one 1.69 oz bag of plain M&M's. It is best if the bags are purchased
at different stores and not obtained from only a few sources of supply.
Complete the table below.
|
| | Color: | Brown | Yellow | Red | Orange | Green | Blue
|
|---|
| Observed | |
| |
| |
|
|---|
| Expected | 0.3n=___ | 0.2n=___ | 0.2n=___ | 0.1n=___ | 0.1n=___ | 0.1n=___
|
|---|
| (O-E)2/E | | | | | |
|
|---|
Now add up the bottom row and call it 
2.
Compare your value with others.
Did any particular color contribute significantly to this value?
Bonus: collect the information from everyone at your table and
use this larger sample to complete the table below.
|
| | Color: | Brown | Yellow | Red | Orange | Green | Blue
|
|---|
| Observed | |
| |
| |
|
|---|
| Expected | 0.3n=___ | 0.2n=___ | 0.2n=___ | 0.1n=___ | 0.1n=___ | 0.1n=___
|
|---|
| (O-E)2/E | | | | | |
|
|---|
Now add up the bottom row and call it 2.
Compare your value with other tables.
Did any particular color contribute significantly to this value?
Bonus: Repeat the process above but using all freshmen
and sophomore data.
Bonus: After completing the count
feel free to dispose of the M&M's® by
any method you deem appropriate.
Set Y1 on your TI-83+ graphing calculator
to Fpdf(X,5,5) (2nd DISTR 8).
Then adjust your viewing window to 0< x <5 with
Xscl=1 and 0< y <0.7 with Yscl=0.1 and
sketch the results.