The cumulative-frequency curve shows the speeds of 300 cars passing a road in the morning.
Use the curve to estimate
the median speed,[1]
the interquartile range of the speeds,[2]
the 70th percentile.[1]
Given that 10% of the cars have a speed greater than \(p\text{ km/h}\), find \(p\).[1]
The box-and-whisker plot below shows the afternoon speeds. Make two comments comparing morning and afternoon speeds.[2]
Ten identical cards are labelled 1 to 10. Two are drawn at random without replacement. Find the probability that
both numbers are odd,[1]
one number is odd and the other is even,[2]
the product of the two numbers is even.[1]
Solution:
Solution locked
Sign in to view the step-by-step solution
Similar questions are unavailable for this question.
Answer:(a)(i)(a) \(29.5\text{ km/h}\) (b) \(7.0\text{ km/h}\) (c) \(32.5\text{ km/h}\) (ii) \(p=38\) (iii) lower median and smaller IQR in morning (b)(i) \(\frac29\) (ii) \(\frac59\) (iii) \(\frac79\)