# Assignment: Cholesterol treatment

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## Assignment: Cholesterol treatment

Assignment: Cholesterol treatment

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Assignment: Cholesterol treatment
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cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective? Cholesterol Decreased No Cholesterol De

A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?

 Cholesterol Decreased No Cholesterol Decrease Total Treatment 38 18 56 No treatment 30 28 58 Total 68 46 114

### Case Assignment

1. Briefly describe the procedure for testing hypotheses.

2. Formulate the null and alternative hypotheses.

3. Determine the test statistic that you will use.

4. Calculate the p-value. Show your work.

5. Discuss whether there is enough evidence to reject the null hypothesis.

##### Informal OSHA complaint letter response

Hi Jerry! This is your OSHA’s Area Director.

We received a non-formal complaint recently from one of your current employees. The complaint alleges that employees there are performing welding operations on stainless steel in an area with inadequate ventilation.

This employee also states that they frequently “cough up” black sputum, and that they are worried about the health consequences caused by this lack of ventilation.

The complaint further states that no air sampling has been performed to evaluate the employees’ exposures to welding fumes. And, that when asked for respirators, they were given “dust masks” with one strap, which were purchased at the local hardware store. The effectiveness of these dust masks for the exposure that is present is also in question.

I will also be sending you an email summarizing this non-formal complaint, so that you can respond accordingly.

Thanks Jerry! Goodbye.

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