Answer
The 5-number summary is 0.58, 0.67, 1.23, 1.41 and 1.49, all in W/kg
Explanation
Firstly, we arrange the given data in ascending order as follows
0.58 0.63 0.67 0.98 0.99 1.23 1.25 1.33 1.41 1.42 1.49
The five-number summary is the minimum, first quartile, median, third quartile, and maximum.
Note: The number of observations, N = 11
The minimum = 0.58
The first quartile, Q₁ = 1/4(N+1) = 1/4 (11+1) = 1/4 (12) = 3, Therefore, the first quartile is the 3rd number = 0.67
The median = 1/2(N+1) = 1/2 (11 +1) = 1/2 (12) = 6. Hence the median is the 6th number = 1.23
The third quartile, Q₃ = 3/4 (N + 1) = 3/4 (11 + 1) = 3/4 (12) = 9. Therefore, the third quartile is the 9th number = 1.41
Lastly, the maximum = 1.49
