## Podcast Beta

## Questions and Answers

Which test would you select if you are concerned with testing the significance of the departure of an observed value in either a positive or a negative direction from the value indicated by our hypothesis?

Compute the standard deviation for the given sample distribution: 8, 6, 5, 25, 20, 34, 78, 12, 23, 45, 35.

What is the primary factor responsible for dust gaining entrance to the alveolar regions of the lung?

Which of the following best describes the coefficient of variation?

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What is the effect of local or generalized grey-blue colored impregnation of the skin tissue?

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Which one of these is the correct permissible exposure level for 2% crystalline quartz dust in the tunnel atmosphere?

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How many years will it take for a radioisotope with a half-life of 1 year to reduce the initial activity to less than 5%?

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What is the worker's exposure for the mixture of toluene, acetone, and MEK with the following concentrations: Toluene at 12.5 ppm (TLV = 50 ppm), Acetone at 200 ppm (TLV = 500 ppm), MEK at 100 ppm (TLV = 200 ppm)?

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What is the volume of gas at 460 degrees Rankine if the initial volume is 150 ml at 120 degrees Fahrenheit?

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Evaluate the effectiveness of the hearing using the following formula:

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## Study Notes

### Statistical Tests

- To test the significance of the departure of an observed value in either a positive or a negative direction from the value indicated by the hypothesis, a two-tailed test should be used.

### Standard Deviation

- The standard deviation for the given sample distribution (8, 6, 5, 25, 20, 34, 78, 12, 23, 45, 35) can be calculated using the formula.

### Respiratory Health

- The primary factor responsible for dust gaining entrance to the alveolar regions of the lung is inhalation.

### Coefficient of Variation

- The coefficient of variation is a relative measure of variability that is expressed as the ratio of the standard deviation to the mean.

### Skin Impregnation

- Local or generalized grey-blue colored impregnation of the skin tissue is an indication of argyria, a condition caused by exposure to silver.

### Permissible Exposure Levels

- The correct permissible exposure level for 2% crystalline quartz dust in the tunnel atmosphere is 0.05 mg/m³.

### Radioisotopes

- A radioisotope with a half-life of 1 year will take 5 years to reduce the initial activity to less than 5%.

### Exposure to Chemical Mixtures

- The worker's exposure to the mixture of toluene, acetone, and MEK can be calculated using the formula for mixed exposures: (12.5/50) + (200/500) + (100/200) = 0.25 + 0.4 + 0.5 = 1.15.

### Gas Volume

- The volume of gas at 460 degrees Rankine can be calculated using the formula: V2 = V1 × (T2 / T1) = 150 ml × (460 + 460) / (120 + 460) = 242.5 ml.

### Hearing Evaluation

- The effectiveness of hearing can be evaluated using the formula: [insert formula].

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## Description

This quiz covers decision theory and hypothesis testing. It includes questions on selecting the appropriate test for testing the significance of a departure from the hypothesis, as well as computing various measures for a given sample distribution. Test your knowledge and enhance your understanding of these concepts with this quiz.