SOLUTION: If we are given the avg weight of males in one class of 50 students is 176 lbs. with a variance of 9 pounds and the avg weight of 36 males in a second class is 166 lbs with a varie

Algebra ->  Probability-and-statistics -> SOLUTION: If we are given the avg weight of males in one class of 50 students is 176 lbs. with a variance of 9 pounds and the avg weight of 36 males in a second class is 166 lbs with a varie      Log On


   

Question 821664: If we are given the avg weight of males in one class of 50 students is 176 lbs. with a variance of 9 pounds and the avg weight of 36 males in a second class is 166 lbs with a varience of 12 pounds, perform a hypothesis test to see if the mean weight of males is different between the two classes. Use a=0.05.
i)Hypothesis
ii)Critical values
iii)Test Statistic
iv)Conclusion
Answer by stanbon(75887) About Me  (Show Source):
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If we are given the avg weight of males in one class of 50 students is 176 lbs. with a variance of 9 pounds and the avg weight of 36 males in a second class is 166 lbs with a varience of 12 pounds, perform a hypothesis test to see if the mean weight of males is different between the two classes. Use a=0.05.
i)Hypothesis
Ho: u1-u2 = 0
Ha: u1-u2 # 0
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I ran a 2 Sample Z-Test with my TI-84 and got the following:
ii)Critical values:: z = +-1.96
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iii)Test Statistic:: 4.2182
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iv)Conclusion:: Since the test stat is in the reject interval
reject Ho. There is a statistically significant difference between
the mean weights.
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Cheers,
Stan H.
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