Question 126316
The following are the first Quiz scores from a previous class:
9.5, 7.5, 9.5, 7, 10, 7.5, 6.5, 1.5, 8, 10
A. Is this data discrete or continuous and why?
Discrete because Quiz scores tend to not cover all possible values between
this set of numbers.
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B. Develop a frequency distribution showing all frequencies, cumulative frequencies, and relative frequencies.
1.5.........1..........10%........Less than 6.5...1
6.5.........1..........10%.................<7.....2
7...........1..........10%.................<7.5...3
7.5.........2..........20%.................<8.....5
8...........1..........10%.................<9.5...6
9.5.........2..........20%.................<10....8
10..........2..........20%.................<11,,,,10

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C. Calculate the Variance and Standard Deviation and describe what they tell you in the context of this problem.
sigma = 2.4 ; variance = 5.76
Approximately 68% of the scores are within 2.4 of the average score
which is 7.7
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Cheers,
Stan H.

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