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This type of bias happens when the statistics of your study or experiment are not a good representation of the target population.
what is statistical bias?-
Selecting every 10th student from an alphabetical roster represents this sampling approach.
What is systematic sampling?
This tool displays randomized digits and allows statisticians to select random samples manually by hand.
What is Random Table of Digits?
When survey respondents lie or give inaccurate answers due to social pressure, this bias is present.
what is response bias?
Confusing, leading, or loaded language in a survey introduces this specific type of flaw.
what is question wording bias?
This study method collects data from every single member of a given population.
Standing at the school entrance and interviewing the first 20 students who walk by uses this method.
What is convenience sampling?
This term describes a subset whose characteristics accurately reflect the entire population.
What is representative sample?
This is the sampling technique where every possible combination of individuals has the exact same probability of being chosen.
What is simple random sample?
These systemic flaws are caused by poor study design or human behavior and cannot be fixed by expanding sample size.
what is non-sampling errors?
Dividing students by grade levels and taking a random sample from each grade illustrates this method.
Stratified sampling
This form of bias occurs when members of the population are left out of the sampling frame.
what is undercoverage?
The best way to ensure your sampling metho is unbiased is to include ______.
what is randomization?
Randomly choosing three classrooms and surveying every student inside those selected rooms uses this method.
Evaluating music's effect on test performance using only high school seniors introduces bias due to a lack of this.
what is representative sampling?
This can be increased in a study to reduce sampling error.
What is sample size?
This bias arises when selected individuals refuse to participate or cannot be reached by researchers.
what is nonresponse bias?
This expected natural variance occurs simply because a sample is selected instead of the full census.
What is sampling error?
Online call-in polls often suffer from this bias because they attract individuals with strong, extreme opinions.
what is voluntary response bias?
Randomly picking five schools, then randomly selecting four classrooms, and then randomly picking 10 students from each chosen room describes this method.
what is multi-stage sampling