The data set below contains the length in seconds of commercials during a football broadcast...

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The data set below contains the length in seconds of commercials during a football broadcast for 20 ads during a game Complete parts a and b 26 21 Seconds a Decide whether the data appear to be approximately normally distributed by comparing data characteristics to theoretical properties 40 Based on the theoretical properties of the normal distribution do the data appear to be approximately normally distributed 30 25 24 22 22 21 20 21 20 No The range is less than the expected value for a normal distribution b Decide whether the data appear to be approximately normally distributed by constructing a normal probability plot Construct the normal probability plot Choose the correct graph below 20 10 3 Z value Q OB Seconds 22 20 40 21 21 30 20 10 21 22 22 20 21 21 0 Z value O C Seconds 40 30 20 10 Z value Seconds 20 10 Z value

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