Question

What is the mean (rounded to two decimal places), medium, range,variance, and standard deviation of the...

What is the mean (rounded to two decimal places), medium, range,variance, and standard deviation of the following set of ages for students who seek counseling at the Campus Counseling Center: 18, 18, 18, 19, 19, 19, 19, 20, 22, 22, 23, 23, 23, 24, 25, 26, 26, 29, 33, 64?

Math   Statistics-And-Probability   
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Answer #1

solution:-
given values are
18, 18, 18, 19, 19, 19, 19, 20, 22, 22, 23, 23, 23, 24, 25, 26, 26, 29, 33, 64
mean = sum of terms / number of terms
= (18+18+18+19+19+19+19+20+22+22+23+23+23+24+25+26+26+29+33+64)/20
= 24.5
median = The median is the middle number in a sorted list of numbers
= (22 + 23)/2  
= 22.5
range = The lowest value is 18
The highest value is 64
The range = 64 - 18
= 46

variance = 102.3684

standard deviation = 10.1177

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