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Chi-Squared Goodness-of-fit-test Please help me solve this problem EDUCATION EXPERTS CONDUCT A STUDY OF A COURSE PERFORMANCE DISTRIBUTION AFTER THE GRADES HAVE BEEN POSTED .

Chi-Squared Goodness-of-fit-test

Please help me solve this problem

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EDUCATION EXPERTS CONDUCT A STUDY OF A COURSE PERFORMANCE DISTRIBUTION AFTER THE GRADES HAVE BEEN POSTED . THEY ASSUMED THE GRADE DISTRIBUTION SPECIFIED IN THE ROW TITLED " PROBABILITY " BELOW GRADES A 1 C I W TOTAL OBSERVED FREQUENCY 60 90 210 75 45 THE 5010 PROBABILITY 0.15 0.20 0.35 0. 15 0.10 0 05 100 EXPECTED COUNTB. HOW MANY DEGREES OF FREEDOM WILL YOU SET FOR THE TEST STATISTIC? NUMBER OF DEGREES OF FREEDOM =

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