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State the null and alternative hypotheses to be tested

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Reference no: EM13579946

A biology professor claimed that the proportions of grades in his classes are the same. A sample of 100 students showed the following frequencies:

Grade        A    B    C     D    E

Frequency 18   20   28   23  11

State the null and alternative hypotheses to be tested.

Determine the rejection region at the 5% significance level.

Compute the value of the test statistics.

Reference no: EM13579946

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