1.3

Select all scenarios which demonstrate the use of a longitudinal study.

A high profile worker- A transit authority

In a experiment, neither clinicians nor partakers know whether the partaker is in the treatment group or the control group.

Double-blind

A market researcher chooses ten people at random from each neighborhood.

Stratified sampling

Select all scenarios which demonstrate the use of a cross-sectional study.

a chain and budget- conscious

Tissue samples from fifteen bodies are analyzed for mercury levels.

case

Fifteen cattle are selected and examined for signs of disease.

case study

Evaluate each member of the population.

census

For administrative purposes, a college president needs to know the average length of tenure of faculty at their college.

census

For tax purposes, a secretary needs to know the average length of tenure of instructors at their school.

census

Select each member of the entire population.

census

A random number generator is used to choose fifteen districts. Then a biologist collects data from each person in these districts.

cluster sampling

A random number generator is used to choose ten cities. Then a political strategist collects data from each person in these cities.

cluster sampling

A scientist interviews each member from each of the five randomly chosen freshmen dormitories at universities across the country

cluster sampling

A statistics student interviews each member from each of the fifteen randomly chosen zoning districts in a town.

cluster sampling

To perform a research study, you need to obtain approval from an .

institunal review board

When conducting legal experiments on animals, a researcher needs to obtain consent from the .

institutional review board

A disaster planner analyzes five weather reports from hurricanes to compare for common factors.

meta

A doctor studies five medical records from patients with a rare blood disease.

meta

A medical researcher studies fifteen medical records from patients with a rare blood disease.

meta-analysis

A study is done an a new drug designed to lower blood pressure. Individuals with high blood pressure are selected for the study and some are given pills containing the drugs while others are given pills that do not contain any of the drug. Even the group which did not take the drug sees an improvement in their blood pressure. What could be causing this?

placebo effect

In a experiment, only the partaker does not know whether they have been placed in the experimental or control group.

single-blind

A statistics student chooses ten people at random from each class.

stratified sampling

First, the population is subdivided by city. Then a crime researcher uses a random number generator to select fifty members from each city to study.

stratified sampling

First, the population is subdivided by district. Then a quality assurance analyst uses a random number generator to select ten members from each district to study.

stratified sampling

For budget purposes, a financial advisor needs to know the average length of tenure of employees at their school.

census

A general manager of a restaurant wants to study the number of cars passing a billboard in a day.

observational

First, the population is subdivided by metropolitan area. Then a political strategist uses a random number generator to select twenty-five members from each metropolitan area to study.

stratified sampling

First, the population is subdivided by region. Then a college student uses a random number generator to select fifteen members from each region to study.

stratified sampling

A general manager of a restaurant wants to find out if her customer base is shrinking.

observeational

First, the population is subdivided by region. Then a political strategist uses a random number generator to select ten members from each region to study.

stratified sampling