A bakery recorded the masses of a batch of 300 cookies.
The cumulative frequency diagram represents the distribution of the masses of the cookies.
Use the curve to estimate
the median mass,[1]
the interquartile range,[2]
the 10th percentile of the cookies.[1]
A cookie is labelled as ‘Medium’ if its mass is greater than or equal to 50 g but less than 56 g.
Two cookies are chosen at random.
Calculate the probability that both are ‘Medium’ cookies.[2]
The masses of a second batch of 300 cookies were also recorded.
The box-and-whisker diagram shows the distribution of the mass.
Make two comments comparing the masses of the cookies in the two batches.
Use figures to support your answer.[2]