19. Statistics are used to report the summary results of market surveys. True False

20. Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet?"

response	frequency
very concerned	140
somewhat concerned	40
no concern	20

What type of chart should be used to show relative class frequencies? A frequency polygon A histogram A bar chart A pie chart 21. Ten experts rated a newly developed chocolate chip cookie on a scale of 1 to 50. Their ratings were: 45, 50, 49, 30, 23, 35, 40, 48, 48 and 46. What is the mean deviation?