boring
The data collected does not have to be measurable.
In continuous grouped data the data is collected continuously and in groups. Data collected is in class intervals the actual data values are not visible.
how is data collected and used for the purpose of national statistics
Primary data is data that is collected by the researcher. Secondary data is information that has been collected by someone other than the user.
Mode is the most frequently occurring value in a data set. See related link. Note that in statistics, the definition is related to the data collected. In probability, the definition is related to the probability distribution which describes the random variable.
Controlled
Dependent variable
dependent variable
dependent variable
Controlled
class midpoints can be computed
The data collected in an experiment test a hypothesis. A hypothesis is an educated guess about a specific question, usually regarding science.
In an experiment, you measure the dependent variable, which is the factor being tested or studied to determine its relationship with the independent variable (the factor you are manipulating). The data collected from measuring the dependent variable helps to analyze the effects of the independent variable.
The factor being tested in an experiment is the independent variable, which is the variable that is manipulated or changed by the researcher. The control variable is a variable that is held constant to prevent it from affecting the outcome of the experiment. The data collected in an experiment is the information or measurements obtained during the study to analyze and draw conclusions.
✅ Legitimate Data Collection Methods: Opt-in Forms & Landing Pages: Users voluntarily fill out a form in exchange for a resource (e.g., eBook, free trial, webinar). This is permission-based and highly reliable. Surveys & Polls: Leads are gathered through online surveys where users share their contact info and preferences. Data may include industry, job title, budget, etc. Partnerships & Co-Registration: Data is collected through affiliate or media partners during content downloads or registrations. These must be transparently disclosed to the user. Publicly Available Sources: Some providers use public directories (e.g., company websites, LinkedIn, Yellow Pages) and aggregate that information. This is common for B2B leads. Event & Webinar Signups: Leads are gathered during industry events, trade shows, or webinars. These can be highly targeted if the topic aligns with your business. Third-Party Data Vendors: Reputable vendors gather and verify data from multiple compliant sources. Always ask if the data is GDPR/CCPA compliant and when it was last updated. ⚠️ Red Flags to Avoid: Scraped data without consent from LinkedIn, Facebook, or websites — this is often illegal and low-quality. Old or outdated lists that haven’t been verified or updated recently. No disclosure of opt-in method—if they can’t explain how the lead was captured, be cautious. ✅ Key Questions to Ask the Vendor: Was this data collected via opt-in or cold scraping? When was the last time this data was updated or verified? Are users aware their data is being resold or shared?
The data collected does not have to be measurable.
An operational variable is a variable that is defined and measured in a specific and observable way so that it can be clearly understood and used in research or study. It helps to ensure that data collected is consistent and allows for accurate comparisons and analysis.