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(X)Outcome Observed Expected
0 1 1.6
1 36 25.3
2 121 151.6
3 441 404.3
4 388 404.3
Determine ?(a) the chi squared test? statistic,? (b) the degrees of? freedom, ?(c) the critical value using alpha equals 0.05?, and ?(d) test the hypothesis at the alpha equals 0.05 level of significance.
Upper H 0?: The random variable X is binomial with n = 4?, p =0.8
H1?: The random variable X is not binomial with n =4?, p =0.8
If last spring the university recruiters interviewed 1,889 graduating seniors, what is the probability that at least 500 of them will enroll this fall?
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Estimate the true proportion of all Americans who are in favor of gun control legislation using a 90% confidence interval.
hen investigating a relationship between birth weight and IQ, researchers found that 258 subjects with extremely low birth weights (less than 1000 g) had Wechsler IQ scores at age 8 with a mean of 95.5 and a standard deviation of 16.0.
Of the 41 males and females, the daily number of servings of soda consumed and the daily amount of hours exercised were compared to find r=-0.698.
Use the model to predict the selling price of a house that is 1,860 square feet.
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Which is more likely to occur-more than 60% correct identifications in the sample of 200 or more than 55% correct identifications in a sample of 1,000? Explain.
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