Intro to Biomedical Statistics (BST 322)

In a study designed to test the effectiveness of a medication as a treatment for lower back​ pain, 1643 patients were randomly assigned to one of three​ groups: (1) the 547 subjects in the placebo group were given pills containing no​ medication; (2) 550 subjects were in a group given pills with the medication taken at regular​ intervals; (3) 546 subjects were in a group given pills with the medication to be taken when needed for pain relief. In what specific way was replication applied in the​ study?

Determine whether the given value is from a discrete or continuous data set.

When a car is randomly​ selected, it is found to have

4 windows4 windows.

For the following​ scenario, identify which of these types of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster.

A medical student collects sample data on

dietary habitsdietary habits

among

adults in her stateadults in her state

by surveying all of theby surveying all of the

adultsadults

she encountersshe encounters

in thein the

nearby cars during her commutenearby cars during her commute

to school during one weekto school during one week

Indicate whether the observational study used is​ cross-sectional, retrospective, or prospective.

In a studyIn a study

of currentof current

coffee consumptioncoffee consumption

amongamong

military veteransmilitary veterans

a survey ofa survey of

869869

military veteransmilitary veterans

was conductedwas conducted.

Determine whether the study is an experiment or an observational​ study, and then identify a major problem with the study.

A sociologist has created a brief survey to be given to 2000 adults randomly selected from the U.S. population. Here are her first two​ questions: (1) Have you ever been the victim of a felony​ crime? (2) Have you ever been convicted of a​ felony?

Identify whether the given value is a statistic or a parameter.

In a study of

500 of the babies500 of the babies

born at five different hospitals in

CaliforniaCalifornia​,

it was found that the average​ (mean) weight at birth of those babies born at those hospitals was

3300.23300.2

grams.