A Researcher Wants to Conduct a Before/after Study on 11

question 80

Multiple Choice

A researcher wants to conduct a before/after study on 11 subjects to determine if a new cholesterol medication results in higher HDL cholesterol readings.The null hypothesis is that the average difference is zero while the alternative hypothesis is that the average difference is not zero.Scores are obtained on the subjects both before and after taking the medication.After subtracting the after scores from the before scores, the average difference is computed to be -2.40 with a sample standard deviation of 1.21.Assume that the differences are normally distributed in the population.The observed t value for this test is _______.

• A)-21.82
• B)-6.58
• C)-2.4
• D)1.98
• E)2.33

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Definitions:

Conjunctivitis

An inflammation of the conjunctiva, the clear lining of the white part of the eye and the inside of the eyelids, often referred to as "pink eye."

Bacterial Infection

An infection caused by bacteria, which can lead to a range of diseases, from minor skin infections to more serious conditions like pneumonia or meningitis.

Viral Infection

An illness caused by a virus, characterized by the invasion and multiplication of the virus within the host's body.

Amblyopia

A vision development disorder where an eye fails to achieve normal visual acuity, often referred to as "lazy eye."