Question

Thirty randomly selected structural elements of a steel bridge were tested about its adequacy/ sufficiency rating on a scale 0 (poor) to 15 (best). The results are as follows [Hint: first generate the complete dataset]:

Rating of bridges elements:         10        11        12        13        15       

Frequency:                                      4          8         7         6          5

Report the Following:

(1) Sample Five-Number Summary and box-plot;

(2) Frequency Distribution of the data;

(3) Percentage of the bridge elements with adequacy/ sufficiency fewer than 12?

Answer 1

10,10,10,10,11,11,11,11,11,11,11,11,
12,12,12,12,12,12,12,13,13,13,13,13,13,15,15,15,15,15

B)

c)

Percentage with sufficiecy fewer than 12

= (4 + 8)/30

=12/30

=0.4