The results of the total test scores of 60 test participants as new employees of a hardware company as following:(image) a. From these data, determine the mean (mean), variance (variance), Quartile-1...

The results of the total test scores of 60 test participants as new employees of a hardware company as following:(image)

a. From these data, determine the mean (mean), variance (variance), Quartile-1 (Q1),
Quartile-3(Q3) and inter-quartile (IQR)

b. Test participants are classified as quite diverse in ability, if the coefficient of diversity
(Coefficient of variation) the score value is more than 15%. Based on the test scores,
Do participants have various abilities?

c. Participants are classified according to the following criteria:
Group I: if the score is less than the average value – (0.5 x IQR)
Group II: if the score is between average – (0.5 x IQR) to (average + (0.5 x IQR)
Group III: if the score is more than the average + (0.5 x IQR)
Count the frequency of participants from each group and visualize.

d. The company will continue the interview for participants who have a score of 25%
biggest. What is the participant's score in order to be able to continue the interview stage?

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