Essay M&M Project 4
Math 300
MM Project PT 4
August 14, 2011
Solution: We want to test the following null and alternative hypotheses
We need to use the zstatistic, which is calculated using
Observe that the sample proportion is
This corresponds to a twotailed ztest for proportions. The zstatistics is computed by the following formula:
The critical value for for this twotailed test is. The rejection region is given by
Since, then we reject the null hypothesis H0.
Hence, we have enough evidence to reject the claim that the true proportion of blue M&Ms® candies is 0.24.
3 pts. Test their claim that the true proportion of orange M&Ms® candies is 0.20 at the …show more content…
Solution: We need to test the following hypotheses
We need to use the zstatistic, which is computed using
Observe that the sample proportion is
This corresponds to a twotailed ztest for proportions. The zstatistics is given by the following formula:
The critical value for for this twotailed test is. The rejection region is given by
Since, then we reject the null hypothesis H0.
Hence, we have enough evidence to reject the claim that the true proportion of yellow M&Ms candies is 0.14.
3 pts. Test their claim that the true proportion of red M&Ms® candies is 0.13 at the 0.05 significance level. Solution: We are interested in testing the following hypotheses
We need to use the zstatistic, which is calculated using
Observe that the sample proportion is
This corresponds to a twotailed ztest for proportions. The zstatistics is given by the following formula:
The critical value for for this twotailed test is. The rejection region is given by
Since, then we fail to reject the null hypothesis H0.
Hence, we don't have enough evidence to reject the claim the true proportion of red M&Ms candies is 0.13.
3 pts. Test their claim that the true proportion of brown

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