A Person's Level of Blood Glucose and Diabetes Are Closely $\mu$

question 14

Multiple Choice

A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is approximately normal with mean $\mu$ = 78 and standard deviation of $\sigma$ = 25. What is the probability that, for an adult after a 12-hour fast, x is more than 49?

• A)0.438
• B)0.188
• C)0.062
• D)0.377
• E)0.877

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Definitions:

Stratified Random Sampling

A probability sampling method in which a population is divided into subpopulation groups called strata; individuals are then randomly sampled from each of the strata.

Psychology Majors

Students specializing in the study of the human mind, behaviors, and emotions in their academic pursuit.

Haphazard Sampling

A non-systematic and random method of selecting samples, lacking any specific structure or plan.

Cluster Sampling

A probability sampling method in which existing groups or geographic areas, called clusters, are identified. Clusters are randomly sampled and then everyone in the selected clusters participates in the study.