Grade-distribution guidelines for an accounting course at a major university are: 10% A, 30% B, 40%...

  

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Grade-distribution guidelines for an accounting course at a major university are: 10% A, 30% B, 40% C, 15% D, and 5% F. A random sample of 100 accounting grades at the end of a semester showed the following results. Grade Observed Frequency A 14 B 25 C 32 D F 20 9 A college professor wishes to test whether the actual grades deviate significantly from the grade- distribution guidelines at the 10% significance level. (i) Set up the hypotheses for the above problem. (ii) Determine the rejection region at the 10% significance level. (iii) Work out the value of the test statistic. (iv) [2] [2] 121 [5] Test, at the 10% level of significance, whether the actual grades deviate significantly from the grade-distribution guidelines. Your answer must include the decision and your conclusion. [3] Grade-distribution guidelines for an accounting course at a major university are: 10% A, 30% B, 40% C, 15% D, and 5% F. A random sample of 100 accounting grades at the end of a semester showed the following results. Grade Observed Frequency A 14 B 25 C 32 D F 20 9 A college professor wishes to test whether the actual grades deviate significantly from the grade- distribution guidelines at the 10% significance level. (i) Set up the hypotheses for the above problem. (ii) Determine the rejection region at the 10% significance level. (iii) Work out the value of the test statistic. (iv) [2] [2] 121 [5] Test, at the 10% level of significance, whether the actual grades deviate significantly from the grade-distribution guidelines. Your answer must include the decision and your conclusion. [3]