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In the journal Knowledge Quest (January/February 2002), education professors at the University of Southern California investigated children's attitudes toward reading. One study measured third through sixth graders' attitudes toward recreational reading on a 140-point scale (where higher scores indicate a more positive attitude). The mean score for this population of children was 106 points, with a standard deviation of 16.4 points. Consider a random sample of 36 children from this population, and let x represent the mean recreational reading attitude score for the sample.
(Give answers to 4 decimal places.)
a) What is ?x?
b) What is ?x?
c) What sample mean would be the cutoff for the bottom 10% of sample means. (You are being asked for the 10th percentile of sample means.)
d) Find P(x < 100).
At 5% level of significance, is true mean smaller than specification? Clearly mention your hypotheses and decision rule.
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Preform post hoc comparisons if necessary and what conclusions can be drawn from the F-ratio and the post hoc comparisons?
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
A high of 10 was possible. A sample of five tests was selected from each group. The test grade results were: At the 0.01 level, what is the critical value?
What is the probability that the number of tails is between 87 and 100 inclusive. round the final answer to 4 decimal places.
Based on the information provided, which set of variables provided the best predictor of the spring fox population?
Which of the examples below represent the Ratio level of scaling?
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