Question 126316: Please help...thank you
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?
B. Develop a frequency distribution showing all frequencies, cumulative frequencies, and relative frequencies.
C. Calculate the Variance and Standard Deviation and describe what they tell you in the context of this problem.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 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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