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For her project, Maria bought 50 small bags of jelly beans. The average number of jelly beans in a small bag is 27. It is known that the standard deviation.

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Presentation on theme: "For her project, Maria bought 50 small bags of jelly beans. The average number of jelly beans in a small bag is 27. It is known that the standard deviation."— Presentation transcript:

1 For her project, Maria bought 50 small bags of jelly beans. The average number of jelly beans in a small bag is 27. It is known that the standard deviation is 3 jelly beans. Maria conducts a hypothesis test to determine if the average number of jelly beans in a small bag is more than 25. The level of significance is 1%. H o : µ ≤ 25H a : µ > 25

2 = the average number of jelly beans in a small bag of jelly beans. Distribution for the Test: Normal for Averages

3 Test statistic: z = 4.71 Standardized score, z-score, for p-value: USE A ZTEST.

4 Decision: REJECT H 0. Conclusion: There is sufficient evidence to conclude that the average number of jelly beans in a small bag is more than 25.


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