The masses, in carats, of a sample of 200 pearls are summarised in the following cumulative frequency graph. One carat is equivalent to 200 milligrams.

a. Use the graph to estimate, in carats:

i. The median mass of the pearls

ii. the interquartile range of the masses.

b. To qualify as a ‘paragon’, a pearl must be flawless and weigh at least 20 grams. Use the graph to estimate the largest possible number of paragons in the sample.

Transcribed Image Text:

200 - 160 pdfeler 120 80 40 - %3D 20 40 60 80 100 120 Mass (carats) Cumulative frequency (No. pearls)