Population
Definition
The population refers to the entire group of individuals or objects that we want to study and draw conclusions about in statistics.
Analogy
Imagine you are at a music festival with thousands of people. The population would be all the attendees at the festival, representing everyone you could potentially survey or gather data from.
Related terms
Sample: A sample is a subset of the population that is selected for data collection. It represents a smaller group within the larger population.
Parameter: A parameter is a numerical summary measure that describes a characteristic of a population.
Census: A census is when data is collected from every member of the population, rather than just a sample.
"Population" appears in:
Study guides (2)
Additional resources (1)
Practice Questions (5)
For a chi square test with a sample size of 35, how large must the population be in order to satisfy the 10% rule?
If it is reported that 1/4 of people in a population of 2500 have green eyes, 1/2 have brown eyes, and the rest have brown eyes, what are the expected values for each eye colour in a sample of 100 people?
Suppose we conduct a chi-square goodness of fit test to examine the distribution of eye colors in a population. We collect data from a random sample of 500 individuals and obtain the following observed frequencies: 100 with brown eyes, 200 with blue eyes, 120 with green eyes, and 80 with hazel eyes. The expected proportions are 40%, 15%, 20%, and 25%, respectively. To calculate the test statistic for this scenario, what would be the next step?
A study was conducted to examine the relationship between eye color (blue and brown) and hair color (blonde and brunette) in a population. There were 40 blue eyed blondes, 60 blue eyed brunettes, 50 brown eyed blondes, and 80 brown eyed brunettes. Calculate the expected count for individuals with blue eyes and brunette hair.
If a sample of size 50 is taken from a population with a known mean and standard deviation, how would you describe the shape of the sampling distribution of the sample mean?
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