5. Over the years grades in an introductory statistics course were recorded and showed the following proportions: A = 0.20 B = 0.30 C = 0.30 D = 0.10 and F = 0.10 This year there were 200 students in the introductory statistics class and they received the following grades A = 56 B = 74 C = 60 D = 9 and F =1 We are interested in knowing if the distribution of grades this year is the same as in the past. The plan is to use a X^{2} statistic. The X^{2} statistic has appromimately a chisquare distribution. How many degrees of freedom does this distribution have? 


6. 
Over the years grades in an introductory statistics course were recorded and showed the following proportions: A = 0.20 B = 0.30 C = 0.30 D = 0.10 and F = 0.10 This year there were 200 students in the introductory statistics class and they received the following grades A = 56 B = 74 C = 60 D = 9 and F =1 To test whether the distribution of grades this year is the same as in the past the X^{2} statistic is calculated. The component of this X^{2} statistic corresponding to a grade of C is 


7. 
Over the years grades in an introductory statistics course were recorded and showed the following proportions: A = 0.20 B = 0.30 C = 0.30 D = 0.10 and F = 0.10 This year there were 200 students in the introductory statistics class and they received the following grades A = 56 B = 74 C = 60 D = 9 and F =1 We are interested in knowing if the distribution of grades this year is the same as in the past. The plan is to use a X^{2} statistic. The X^{2} statistic has a computed value of 33.77. The pvalue of the test is 


8. 
Over the years grades in an introductory statistics course were recorded and showed the following proportions: A = 0.20 B = 0.30 C = 0.30 D = 0.10 and F = 0.10 This year there were 200 students in the introductory statistics class and they received the following grades A = 56 B = 74 C = 60 D = 9 and F =1 We are interested in knowing if the distribution of grades this year is the same as in the past. The plan is to use a X^{2} statistic. We may assume the X^{2} statistic has an approximate chisquare distribution because of the following? 


9. 
Over the years grades in an introductory statistics course were recorded and showed the following proportions: A = 0.20 B = 0.30 C = 0.30 D = 0.10 and F = 0.10 This year there were 200 students in the introductory statistics class and they received the following grades A = 56 B = 74 C = 60 D = 9 and F =1 To test whether the distribution of grades this year is the same as in the past the X^{2} statistic is calculated. The grade category that contributes the largest component to the X^{2} statistic is 


Subject  Mathematics 
Due By (Pacific Time)  07/28/2014 03:00 pm 
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