Concept explainers
Calculate measures of variation and outlier for given number of fish in each fish tank.
6, 5, 7, 8, 5, 6, 7, 9, 8, 6
Answer to Problem 17SGR
Measures of variation for given number of fish in each fish tank are as follows,
Range = 4
Upper quartile=8
Lower quartile=6
Interquartile range=2
Explanation of Solution
Given:
Number of fish in each fish tank = 6, 5, 7, 8, 5, 6, 7, 9, 8, 6
Calculations:
Here, we have to calculate measures of variation and outlier for given set of data.
Measures of variation include range, upper quartile, lower quartile and interquartile range of given data.
Range is the difference between higher and lower data value.
Here, range = 9-5=4
Median for given set of data is,
Upper quartile is the median of upper half set of data.
Here, Upper quartile = 8
Lower quartile is the median of lower half set of data.
Here, lower quartile = 6
Interquartile range is the difference between upper quartile and lower quartile.
Here, interquartile range =8-6=2
Now, to find outlier, we need to multiply interquartile range by 1.5 and then subtracting it from lower quartile and adding it to upper quartile.
Thus, multiplying 1.5 with interquartile range,
Then, subtracting it from lower quartile and adding it to upper quartile,
6-3=3 and 8+3=11
Therefore, limits of outlier are 3 to 11. But there is nothing beyond outlier limits. Hence there is no outlier for given data of number of fish in each fish tank.
Conclusion:
Therefore, we are able to calculate measures of variation and possible outlier for given set of data.
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