In a study of parents’ feelings about a required course in sex education, 360 parents, a random sample, are classified according to whether they have one, two, or three or more children in the school system and also whether they feel that the course is poor, adequate, or good. Based on the results shown in the following table, test at the 0.05 level of significance whether there is a relationship between parents’ reaction to the course and the number of children that they have in the school system:
Answer to relevant QuestionsTests of the fidelity and the selectivity of 190 radios produced the results shown in the following table: Use the 0.01 level of significance to test the null hypothesis that fidelity is independent of selectivity. It is desired to test whether the number of gamma rays emitted per second by a certain radioactive sub-stance is a random variable having the Poisson distribution with λ = 2.4. Use the following data obtained for 300 ...With reference to Example 14.1, show that the regression equation of X on Y is Also sketch the regression curve. In Example 14.1 Solve the normal equations on page 390 simultaneously to show that Use the result of part(b) of exercise 14.20 to show that Is a value of a random variable having the standard normal distribution. Also, use the first part of Theorem 14.3 and the fact that A and n∑2/σ2 are independent to ...
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