Barium-137m is a radioactive form of the element barium that decays very rapidly. It is easy...

 

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Barium-137m is a radioactive form of the element barium that decays very rapidly. It is easy and safe to use for lab experiments in schools and colleges. In a typical experiment, the radioactivity of a sample of barium-137m is measured for one minute. It is then measured for three additional one-minute periods, separated by two minutes. Thus, data are recorded at one, three, five, and seven minutes after the start of the first counting period. The measurement units are counts transformed using a log transformation. Find the correlation r between the log of the counts and time. Give your answer to three decimal places. r= Do you think that the correlation you computed gives a good numerical summary of the strength of the relationship between these two variables? No, because the association between count and time is strong but non-linear. Yes, because the association between count and time is strong and linear. Yes, because the association between count and time is strong. No, because the association between count and time is weak. Barium-137m is a radioactive form of the element barium that decays very rapidly. It is easy and safe to use for lab experiments in schools and colleges. In a typical experiment, the radioactivity of a sample of barium-137m is measured for one minute. It is then measured for three additional one-minute periods, separated by two minutes. Thus, data are recorded at one, three, five, and seven minutes after the start of the first counting period. The measurement units are counts transformed using a log transformation. Find the correlation r between the log of the counts and time. Give your answer to three decimal places. r= Do you think that the correlation you computed gives a good numerical summary of the strength of the relationship between these two variables? No, because the association between count and time is strong but non-linear. Yes, because the association between count and time is strong and linear. Yes, because the association between count and time is strong. No, because the association between count and time is weak.