An 85-Kg Person Exposed to Barium-141 Receives 2

question 63

Multiple Choice

An 85-kg person exposed to barium-141 receives 2.5 × 10⁵ β particles,each with an energy of 5.2 × 10^-13 J.How many rads does the person receive? (1 rad = 1 × 10^-5 J/g)

• A)2.4 × 10^-20 rads
• B)1.5 × 10^-7 rads
• C)1.8 × 10^-16 rads
• D)6.1 × 10^-15 rads
• E)None of the answers is correct.

---

Definitions:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true; a measure of the risk of making a Type I error.

Test Statistic

A calculated value used in statistical testing to determine whether to reject the null hypothesis.

T Value

A measure derived in a t-test that shows the size of the difference relative to the variation in your sample data.

T Test

A statistical hypothesis test used to determine if there is a significant difference between the means of two variables.