The Following are the scores of 20 students who took

jazzcutie0h 2021-11-30 Answered
The Following are the scores of 20 students who took a calculus exam. Find the mean and standard deviation of the given data. Round to the nearest tenth, if necessary.
Score768285909295Frequency523433
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Expert Answer

Fachur
Answered 2021-12-01 Author has 17 answers
Step 1
Mean
=xififi
=76(5)+82(2)+85(3)+90(4)+92(3)+95(3)20
=86
Step 2
For standard deviation, we make a table
datadatamean(datamean)2frequency(datamean)2frequency761010055008241623285113390416464926363108959813243
Then we add the values form the last column
(xix)2fi=950
Then we use it to find the standard deviation
(xiX)2fin=95020=6.9
Answer: Mean=86
Standard deviatiion =6.9
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