The Half-Life of ¹³¹I Is 8

question 47

Multiple Choice

The half-life of ¹³¹I is 8.04 days. Three days after it was prepared, its activity was 0.50 μCi. How many curies (in μCi) were initially prepared?

• A) .60
• B) .70
• C) .65
• D) .55
• E) .39

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Definitions:

Outlier

A data point that diverges significantly from the overall pattern of data in a dataset, potentially indicating a measurement error or a new trend.

IQR

The Interquartile Range (IQR) is a measure of statistical dispersion, being equal to the difference between the 75th and 25th percentiles of a data set.

Chebyshev's Theorem

A statistical theorem stating that for any real dataset, the proportion of values that fall within k standard deviations from the mean is at least 1-1/k^2 for k > 1.

Empirical Rule

A statistical principle that asserts in a normal distribution, almost all of the data is contained within three standard deviations from the mean.