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1. Females in a certain class rated their intelligence with a mean of 6.5. The males in the same class rated their intelligence with a mean of 7.25. The difference in the mean ratings (male - female) was
A. -0.75 points.B. 0.75 points.C. 13.75 points.
2. Females in a certain class rated their intelligence with a mean of 6.5 with standard deviation 1.12. The males in the same class rated their intelligence with a mean of 7.25, with standard deviation 1.50. The standard deviation of the difference in the ratings (male - female) was
A. 0.38.B. 3.50.C. 1.87.29. Most people think babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3% of all babies are boys. If a family has two children (not twins), what is the chance both children are boys?
A. 25%B. 102.6%C. 26.3%
3. Most people think babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3% of all babies are boys. If a family has two children (not twins), what is the chance they have one boy and one girl?
A. 0.25B. 0.50C. 0.24
Any value which is based on having measured a sample is called:
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