SOLUTION: A final exam in statistic has a mean of 73 with a standard deviation of 7.73. Random sample of 24 students is selected and the mean test score of the sample is computed. What perc
Algebra.Com
Question 609948: A final exam in statistic has a mean of 73 with a standard deviation of 7.73. Random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A final exam in statistic has a mean of 73 with a standard deviation of 7.73. Random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
-----------------------
z(70) = (70-73)/[7.73/sqrt(24)] = 1.9013
----
P(x-bar < 70) = P(z < 1.9013) = 0.9714
=================================
Cheers,
Stan H.
===============
RELATED QUESTIONS
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume... (answered by jim_thompson5910)
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume... (answered by stanbon)
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73.
Assume a... (answered by reviewermath)
.A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a... (answered by stanbon)
A final exam in Math 160 has a mean of 73 with a standard deviation of 7.8. If 24... (answered by Boreal)
A final exam in MATH 121 has a mean of 73 with a standard deviation 7.80. If 34 students... (answered by stanbon)
A final exam in Math 1148 has a mean of 73 with standard deviation 7.8. If 54 students... (answered by stanbon)
A final exam in Math 1148 has a mean of 73 with standard deviation 7.8. If a student is... (answered by ewatrrr)
AP exam in math has a mean score of 73 with a standard deviation of 7.8. If one student... (answered by tommyt3rd)