Question

1. - / 1 points suppose a class obtained the following scores on a test. score frequency 90 1 80 4 70 10 60 5 50 3 what is the mean? (round your answer to one decimal place. if an answer does not exist, enter dne.)

Explanation:

Step1: Calculate total score

Multiply each score by its frequency and sum:
\(90\times1 + 80\times4 + 70\times10 + 60\times5 + 50\times3\)
\(= 90 + 320 + 700 + 300 + 150 = 1560\)

Step2: Calculate total frequency

Sum the frequencies:
\(1 + 4 + 10 + 5 + 3 = 23\)

Step3: Calculate mean

Mean = \(\frac{\text{Total Score}}{\text{Total Frequency}} = \frac{1560}{23} \approx 67.8\)

Answer:

67.8