The Decay Rate of a Radioactive Sample Decreases from 175

question 73

Short Answer

The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the mean life (time constant) of this sample?

---

Definitions:

Sampling Distribution

The probability distribution of a given statistic based on a random sample.

Central Limit Theorem

A statistical theory that states that the sampling distribution of the sample mean will approach a normal distribution as the sample size becomes larger, regardless of the shape of the population distribution.

Test Statistic

A calculated value from statistical test data used to determine whether to reject the null hypothesis in favor of the alternative hypothesis.

Average Amount

The sum of a set of numerical values divided by the count of values, typically used to find the central or typical value in a data set.