Fifty 10-gram samples of a particular type of mushroom are collected by volunteers at a university and tested. The following table shows the mass of toxins, in hundredths of a gram, in these samples.

a. Draw a cumulative frequency curve to illustrate the data.

b. Use your curve to estimate, correct to 2 decimal places:

i. The interquartile range

ii. The range of the middle 80%.

c. It was found that toxins made up between 0.75% and 2.25% of the mass of n of these samples. Use your curve to estimate the value of n.

d. Make an assessment of the variation in the percentage of toxic material in these samples. Can you suggest any possible reasons for such variation?

Transcribed Image Text:

Mass (10.01 0- 4- 11- 17- 20-30 No. 10g ples 19 23 3 mbi 3.