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In an open-plan office there are 88 computers. The times taken by these 88 computers to access a particular web page are represented in the cumulative frequency diagram.
- On graph paper draw a box-and-whisker plot to summarise this information.
An 'outlier' is defined as any data value which is more than 1.5 times the interquartile range above the upper quartile, or more than 1.5 times the interquartile range below the lower quartile.
- Show that there are no outliers.
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Nikita goes shopping to buy a birthday present for her mother. She buys either a scarf, with probability 0.3 , or a handbag. The probability that her mother will like the choice of scarf is 0.72 . The probability that her mother will like the choice of handbag is \(x\). This information is shown on the tree diagram. The probability that Nikita's mother likes the present that Nikita buys is 0.783 . - Find \(x\).