Which best describes the spread of a set of data that has an interquartile range of 18 and a mean absolute deviation of 10? a. the average distance of all data values from the mean is 18 and the middle 50% of data values has a range of 10. b. the average distance of all data values from the mean is 14 and the middle 50% of data values has a range of 8. c. the average distance of all data values from the mean is 14 and the middle 50% of data values has a range of 28. d. the average distance of all data values from the mean is 10 and the middle 50% of data values has a range of 18.

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below. correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance. what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

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Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.