# Mean Score

Q4) In a statistics course, there are five examinations. A student receives scores of 83, 85, 80, and 81 on the first four exams. What score must the student get on the fifth exam in order to have a mean average of 80 for the five exams? Explain your answer.

© BrainMass Inc. brainmass.com June 3, 2020, 10:31 pm ad1c9bdddfhttps://brainmass.com/statistics/quantative-analysis-of-data/mean-score-234917

#### Solution Preview

Answer

Let x be the required score, since the average for the five exams is 80,

Thus (83+85+80+81+x)/5 = 80

83+85+80+81+x = 80*5 =400

X = 400-(83+85+50+81)=71

The ...

#### Solution Summary

The solution provides step by step method for the calculation of mean score based on a restriction . Formula for the calculation and Interpretations of the results are also included.

$2.19