3. A semiconductor manufacturer produces devices used as central processing unit

Question

3. A semiconductor manufacturer produces devices used as central processing units in personal comput- manufacturer can charge for the devices. A boxplot for the speeds of 116 randomly selected devices is given below. Boxplot for Speed of Devices 660 680 700 T20 740 760 speed (in megahertz) a Using only the boxplot, estimate the probability that a randomly selected device from the sample has a speed of at least 700 megahertz. b Suppose the manufacturer wishes to determine the number of devices in the sample that have speeds of less than 650 megahertz. Can you get this information from the boxplot? If so, how many devices are there? If not, what graphic might you use instead?

Explanation / Answer

in a boxplot the left line of the box indicates 1st volatile and the middle line indicates median and the right line of the box indicates the third quartile which means before the third quartile 3/4th of the total observation lies. the estimated probability is equal to 3/4

in the second question the number of devices in the sample that have speed less than 650 megahertz cannot be calculated from the box plot

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