7) 7) the data listed on the horizontal axis in the graph Internet Usage 20 16 1

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7) 7) the data listed on the horizontal axis in the graph Internet Usage 20 16 13 25 37 48 73 85 Minutes online D) ordinal C) ratio A) interval B) nominal 8) 8) the final grades (A, B, C, D, and F) for students in a statistics class D) ratio B) interval C) nominal A) ordinal 9) 9) number of pages in your statistics book A) ratio B) ordinal C) interval D) nominal 10) temperatures of 73 selected refrigerators 10) A) ratio B) interval C) ordinal D) nominal 11) numbers on the shirts of a girl's soccer team A) interval B) ordinal C) nominal D) ratio 12) Which one of the following data are continuous? 12) A) the number of musicians performing in the MP3 file B) the number of times the file has been downloaded C) the time remaining for an MP3 music download D) all of these represent continuous data Determine whether the study is an observational study or an experiment. 13) A scientist was studying the effects of a new fertilizer on crop yield. She randomly assigned half of the plots on a farm to group one and the remaining plots to group two. On the plots in group one, the new fertilizer was used for a year. On the plots in group two, the old fertilizer was used. At the end of the year the average crop yield for the plots in group one was compared with the average crop yield for the plots in group two. A) experiment 13) B) observational study 14) A poll is conducted in which professional musicians are asked their ages. A) observational study 14 B) experiment

Explanation / Answer

7) Option (A), Interval

8) Option (A), Ordinal

9) Option (A), Ratio

10) Option (B), Interval

11) Option (C), Nominal

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