>>>>>>Data Scientist Tricky Interview Questions
##### Which of the following is not possible to compute for the following data set? Data set – 23,43,223,54,64,0,1,2 a. Median b. Mean c. Mode d. Standard Deviation e. Geometric Mean f. Harmonic Mean
A. Whenever there is a data point 0, then you cannot compute the Harmonic mean
##### Can a geometric mean be negative?
Like zero, it is impossible to calculate Geometric Mean with negative numbers. However, there are several work-around for this problem, all of which require that the negative values be converted or transformed to a meaningful positive equivalent value.
##### 2nd Quartile = 5th Decile = 50th Percentile = ? a. Harmonic Mean b. Mode c. Median d. Mean
A. Median is the 50th percentile which is equal to 5th decile, each decile denotes 10 percentile
A. Bi-modal
##### Which measure of average can have more than one value? a. Mode b. Mean c. Median d. Harmonic Mean
A. A series can have more than one value for mode. Example – 2,3,4,5,5,5,4,4,6,7,7 Here both 5 and 4 are mode