SOLUTION: 1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60. What was the mean score for the 11 female students?

SOLUTION: 1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60. What was the mean score for the 11 female students? - W

Question 444809: 1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60. What was the mean score for the 11 female students?
- What is the mean Score for Female Students is what? and how do you calc this?
also
2.A sample of 12 measurements has a mean of 40 and a standard deviation of 3.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 40 each.
-Find the standard deviation of the sample of 14 measurements.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
1. Suppose that the mean score of a class of 30 students was 73. The 19 male students in the class had a mean score of 60.
Total student points = 30*73 = 2190
Total male points = 19*60 = 1140
What was the mean score for the 11 female students?
Total female points is (2190-1140) = 1050
So the mean score for the 11 girls = 1050/11 = 95.45
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- What is the mean Score for Female Students is what? and how do you calc this?
also
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2.A sample of 12 measurements has a mean of 40 and a standard deviation of 3.5.
Total points = 12*40 = 480
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Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 40 each.
Total points is now 1320 with mean = 40
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-Find the standard deviation of the sample of 14 measurements.
The spread of the data has not changed because the 2 added number
values are at the mean. So new std = 3.5
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Cheers,
Stan H.

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