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Question 80644: Not sure if this is the right area, but could use some help. thank you for your time
The table below shows the frequency distribution for 12 students on a test with a maximum score of 20. Use these sample data to answer questions 5 through 7:
Score Frequency Midpoint Midpoint x Frequency Midpoint squared x Frequency
1 - 5 5
6 - 10 3
11 - 15 2
16 - 20 2
Totals
______5. The mean score, , of the data in the frequency distribution above is (to the nearest 1/10)
a. 8.0 b. 8.4 c. 8.7 d. answer not listed
______6. The standard deviation of the scores in the frequency distribution above is (to the nearest 1/10)
a. 5.0 b. 5.3 c. 5.8 d. answer not listed
_____7. The median score lies in which score interval?
a. 1 – 5 b. 6 – 10 c. 11 – 15 d. 16 - 20
thank you for your help David
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The table below shows the frequency distribution for 12 students on a test with a maximum score of 20. Use these sample data to answer questions 5 through 7:
Score Frequency Midpoint Midpoint x Frequency Midpoint squared x Frequency
1 - 5 5
6 - 10 3
11 - 15 2
16 - 20 2
Totals
______5. The mean score, , of the data in the frequency distribution above is (to the nearest 1/10)
a. 8.0 b. 8.4 c. 8.7 d. notlisted
ANSWER: 8.4
______6. The standard deviation of the scores in the frequency distribution above is (to the nearest 1/10)
a. 5.0 b. 5.3 c. 5.8 d. answer not listed
ANSWER: 5.8
_____7. The median score lies in which score interval?
ANSWER: The median is 8 which lies in the interval 6 - 10.
a. 1 – 5 b. 6 – 10 c. 11 – 15 d. 16 - 20
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Cheers,
Stan H.
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