Correlational Research,using Self-Report Data,has Investigated the Link Between Sleep Duration

question 115

Multiple Choice

Correlational research,using self-report data,has investigated the link between sleep duration and mortality risk.The two key findings are: people who consistently sleep less than seven hours exhibit ____ mortality risk; people who consistently sleep more than eight hours exhibit ____ mortality risk.

• A) an increased; a decreased
• B) a decreased; an increased
• C) an increased; an increased
• D) a decreased; a decreased

---

Definitions:

Probabilities

A numerical representation, between 0 and 1, of the probability that an event will take place.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution.

Standard Normal Distribution

The standard normal distribution is a special case of the normal distribution that has a mean of zero and a standard deviation of one.

Standard Normal Distribution

A normal distribution with a mean of 0 and a standard deviation of 1, used as a basis for comparison in statistical analysis.