A Certain Radioactive Element Has a Half-Life of One Hour

question 74

Multiple Choice

A certain radioactive element has a half-life of one hour.If you start with a 1-g sample of the element at noon,how much of this same element will be left at 3:00 PM?

• A)0.5 gram
• B)0.25 gram
• C)0.125 gram
• D)0.0625 gram

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Definitions:

F-test

A group of statistical tests that compare the variances among different sample groups to ascertain if they come from populations with equal variances.

Independent Variables

The variables that are manipulated or categorised to determine their effect on the dependent variable in an experiment.

Observations

Data collected during an experiment or research that are analyzed to draw conclusions.

Critical Value

A predetermined point on the distribution of a test statistic at which the null hypothesis is rejected if exceeded.