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WorksheetsBisiness Statistics (descriptive2)
Total questions: 14
Worksheet time: 14mins
Given the data set: 1, 3, 5, 7, 9, 11,13, what is the average?
5
7
9
7.5
Given the data set: 1, 3, 5, 7, 9, 11,13, 15 what is the average?
5
7
8
7.5
Given the data set: 1, 3, 5, 7, 9, 11,13, 15 what is the median?
8
7
8.5
7.5
Given the data set: 1, 3, 5, 7, 9, 11,13 what is the median?
6.5
7
8.5
7.5
Given the data set: 1, 2, 3, 4, 5 what is the variance?
3
3.5
2
2.5
Given the data set: 1, 2, 3, 4, 5 what is the standard deviation?
1.6
2.1
1.58
2.5
Given the data set: 1, 2, 3, 4, 5 what is the range?
6
4
5
3
Given the data set: 1, 3, 5, 7, 9, 11,13, 150 what is the median?
8
7
8.5
7.5
Given the data set: 1, 2, 3, 4, 5 what is the 0.5 percentile?
2
4
5
3
Given the data set: 1, 2, 3, 4, 5 what is the 0.25 percentile?
2
4
5
3
Given the data set: 1, 2, 3, 4, 5 what is the 0.75 percentile?
2
4
5
3
Given the data set: 1, 2, 3, 4, 5 what is the interquartile range?
2
4
5
3
What is the 68, 95, 99.7 rule?
A. For bell-shaped distributed data, 68% of the data are located within one standard deviation range from the average, 95% of the data are located within two standard deviation range from the average and 99.7% of the data are within three standard deviation range from the average.
B. For any data, 68% of the data are located within one standard deviation range from the average, 95% of the data are located within two standard deviation range from the average and 99.7% of the data are within three standard deviation range from the average.
C. For most symettrically distributed data, 68% of the data are located within one standard deviation range from the average, 95% of the data are located within two standard deviation range from the average and 99.7% of the data are within three standard deviation range from the average.
A and C.
The average GMAT score is 547 (Magoosh website, January 5, 2015). Assume that GMAT scores are bell-shaped with a standard deviation of 100. Which of the following statement is correct?
16% of the scores are below 447
16% of the scores are above 647
50% of the scores are above 547
2.5 % of the scores are below 347
all are correct
