[amp_mcq option1=”Vertical study” option2=”Cross-sectional study” option3=”Time series study” option4=”Experimental study” correct=”option1″]<\/p>\n
The correct answer is A. Vertical study.<\/p>\n
A vertical study, also known as a longitudinal study, is a type of research study that follows a group of people over a period of time. This type of study is often used to track changes in a population over time, such as changes in height, weight, or health.<\/p>\n
In the case of the question, the statement “Nine year olds are taller than seven year olds” is an example of a reference drawn from a vertical study. This is because the statement is based on the observation of a group of people (children) over a period of time (from age 7 to age 9).<\/p>\n
The other options are incorrect because they do not describe the type of study that was conducted. A cross-sectional study is a type of research study that collects data from a group of people at a single point in time. A time series study is a type of research study that collects data from a group of people over multiple points in time. An experimental study is a type of research study that involves the manipulation of one or more variables in order to observe the effect on another variable.<\/p>\n","protected":false},"excerpt":{"rendered":"
[amp_mcq option1=”Vertical study” option2=”Cross-sectional study” option3=”Time series study” option4=”Experimental study” correct=”option1″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[954],"tags":[],"class_list":["post-48095","post","type-post","status-publish","format-standard","hentry","category-teaching-and-research","no-featured-image-padding"],"yoast_head":"\n