SOLUTION: consider a population with u=77.6 and o=5.63. calculate the z-score for xvbar = 76.1 from a sample sixe of 52. Could this z score be used in claculating probabilities why or why

Algebra ->  Probability-and-statistics -> SOLUTION: consider a population with u=77.6 and o=5.63. calculate the z-score for xvbar = 76.1 from a sample sixe of 52. Could this z score be used in claculating probabilities why or why       Log On


   

Question 612132: consider a population with u=77.6 and o=5.63. calculate the z-score for xvbar = 76.1 from a sample sixe of 52. Could this z score be used in claculating probabilities why or why n0t?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
consider a population with u=77.6 and o=5.63. calculate the z-score for xvbar = 76.1 from a sample sixe of 52. Could this z score be used in claculating probabilities why or why n0t?
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z(76.1) = (76.1-77.6)/[5.63/sqrt(52)] = -1.9212
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Some texts would say you should ALWAYS use a t-score
for these calculations regarding sample means; others
would say you may use a z-score as long as n > 30.
Check your text.
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Cheers,
Stan H.