Question 1

The mean is the 50th percentile of any normal distribution.

Group of answer choices

True

False

Question 2

The mean is a better measure of location (central tendency) when there are no outliers.

Group of answer choices

True

False

Question 3

The mean measure of high density lipoprotein (HDL), or good cholesterol, is 54 with a standard deviation of 17 in patients over age 50. If the HDL values are obtained from a sample of 32 individuals, the probability of getting a mean HDL value over 62 is 0.049.

Group of answer choices

True

False

Question 4

A newly developed medical procedure to prevent death in women who give birth and experience eclampsia has a 97.5% success rate of saving the woman's life. If a doctor uses this medical procedure in 6 women who experience eclampsia and have no other comorbid conditions, the probability that all 6 women will survive is approximately 0.859.

Group of answer choices

True

False

Question 5

If the odds of catching the flu among individuals who take vitamin C is 0.0342 and the odds of catching the flu among individuals not taking vitamin C is 0.2653, then the individuals not taking vitamin C are 7.7573 times more likely to catch the flu than individuals taking vitamin C.

Group of answer choices

True

False

Question 6

The most widely used measure of variability for a continuous variable is called the standard deviation.

Group of answer choices

True

False

Question 7

A healthcare provider notices an outbreak of foodborne illness among individuals who attended a holiday cookout. Which study type would be most beneficial in identifying the source of the outbreak?

Group of answer choices

A cross-sectional survey

A case-control study

A case series

A retrospective cohort study

Question 8

A new drug is released to market and it has been determined that the drug is responsible for causing hypertension among those individuals who take the drug. If 30,276 individuals were prescribed the drug in its first year on the market and 17,620 individuals developed hypertension, what is the point prevalence of hypertension among those individuals prescribed the drug, after the drug's first year on the market?

Group of answer choices

5.82000

0.05820

0.00582

0.58200

Question 9

Biostatistics is integral to the practice of public health because it allows public health professionals to accurately monitor and track the prevalence of disease within a population.

Group of answer choices

True

False

Question 10

Drug manufactures of Drug X, which was released on the market 5 years ago to treat Crohn's disease, have noticed that many individuals treated with the drug have developed drug-induced lupus. A cohort study was conducted for post-marketing surveillance. It has documented that 6 individuals have developed drug-induced lupus over the course of the past 5 years. If 1 individual developed the disease at the 1-year mark, 3 developed the disease at the 2-year mark, 1 developed the disease at the 3-year mark, and the final individual developed the disease at the 4-year mark, what is the incidence rate of drug-induced lupus?

Group of answer choices

0.0429

0.4290

0.9571

0.5710

Question 11

A study is designed to evaluate the impact of a daily multivitamin on students' academic performance. One hundred sixty students are randomly assigned to receive either the multivitamin or a placebo and are instructed to take the assigned drug daily for 20 days. On day 20, each student takes a standardized exam and the mean exam scores are compared between groups. This study is an example of a Randomized Control trial.

Group of answer choices

True

False

Question 12

True/False? Five hundred people are enrolled in a 10-year cohort study. At the start of the study, 50 have diagnosed CVD. Over the course of the study, 40 people who were free of CVD at baseline develop CVD. The prevalence of CVD at 10 years is 10%.

Group of answer choices

True

False

Question 13

With a binomial distribution with n = 25 and p = 0.48, which is larger?

Group of answer choices

P(10 successes)

P(9 successes)

P(20 successes)

P(12 successes)