# Minitab Notes for Activity 3

## Testing a Claim About a Proportion (Question 5)

The instructor has claimed that 35% of the candies are strawberry flavored.
Statisticians and statistical software usually works with proportions instead
of percentages. Proportions are the decimal representation of a percentage,
so 35% would be 0.35.

- Go to Stat / Basic Statistics / 1 Proportion
- Click on the Summarized data radio button
- Enter 40 for the number of trials
- Enter the number of strawberry (pink wrapper) candies that you found in
your bag for the number of successes.
- Click on Options
- Enter 0.35 (whatever proportion you're testing) for the Test proportion.
The default value is 0.5, but we're not testing that one-half of
the candies are strawberry, so it's important to go in and change
this.
- Click OK.

- Click OK

Note that the confidence interval will appear as ( #### , #### ) where there
####'s are the lower and upper limits of the interval. These are given
as proportions (decimals) not percents. If you convert them to percents, be
sure to write the % sign after them. If the computer says (0.3215,0.6521), then
write it on your paper as 0.3215 < p < 0.6521 or 32.15% < p < 65.21%.

Go to Activities page

Go to Math 113 homepage.

Last updated
January 7, 2003 9:38 PM