Sampling Methods
If a sample is collected by using a random number generator to select a set number of individuals from the population, this is the sampling method used.
What is simple random sampling?
The standard deviation is the square root of this measure of dispersion.
What is variance?
What is monotonicity?
Correlation coefficients assess these two attributes for the relationship between two variables.
What are strength and direction?
This is the difference between something being random and something being arbitrary.
What is random implies there is no bias in choosing something randomly versus there being no rationale/reasoning used in choosing something arbitrarily?
If a sample is collected by surveying every fifth person on the list from the population of interest, this is the sampling method used.
What is systematic sampling?
This is how to calculate the relative frequency for a value or class from its frequency.
What is divide the frequency of that value or class by the sample size?
This is how to calculate Spearman's rank correlation coefficient using the graphing calculator.
What is enter the ranks for each variable in a separate list and use a linear regression model to calculate Pearson's correlation coefficient using the ranks rather than the data values themselves?
This would be a prediction made outside the boundaries of the data used for the regression model.
What is an extrapolation?
This suite was written in 1874 by Russian composer Modest Mussorgsky.
What is Pictures at an Exhibition?
If a sample is collected for the student body by surveying the students that are in your homeroom classroom, then this is the sampling method used.
What is convenience sampling?
If 500 students are surveyed about minutes studied per night, resulting in a minimum of 0 minutes, a lower quartile of 10 minutes, a median of 40 minutes, an upper quartile of 90 minutes, and a maximum of 200 minutes, then this is the approximate cumulative frequency of 90 minutes.
What is 375?
Since the existence of a correlation does not necessarily mean there is a causal relationship, this is the only way to verify a causal relationship.
What is a controlled experiment?
If this happens to a set of data for two variables, it would result in the value of Pearson's product moment correlation coefficient changing while the value of Spearman's rank correlation coefficient stays the same.
What is the measured values change in a manner that does not change the rankings for each variable?
As of April 2025, this is the number of scripted television series produced by or involving the global media company Shondaland.
What is 13?
If a sample is collected by breaking up the population by specific categories before taking a random sample from each category, this term is what the categories are called.
What are strata?
In a distribution that is skewed to the right, this is typically the order in magnitude of its three measures of central tendency.
What is no because this would be an extrapolation due to the model being limited to data from high school students?
If the scatter plot showcases that the variables have a relationship that looks approximately parabolic, then, between r and rs, this correlation would be more appropriate.
Neither would be especially appropriate, but since it is nonlinear, between the two, rs would be less inappropriate.
This Disney/Pixar movie includes a circus train called Casey Jr.
What is A Bug's Life?
If a sample is collected by strategically choosing individuals from the population so that specific qualities are held by a predetermined proportion of the sample, then this is the sampling method used.
What is quota sampling?
This is the difference between a boxplot and a modified boxplot.
What is outliers are denoted with asterisks rather than being in the whiskers in modified boxplots?
If four values are tied for the second place rank from the data set, this is how to approach ranking them.
This is why a linear regression model cannot predict a value of the independent variable from the dependent variable.
What is the linear regression of the dependent variable on the independent variable would be completely different than the linear regression of the independent variable on the dependent variable since it minimizes the sum of the squares of the residuals in the y direction for the line (minimizing it in the x direction would often result in a different line entirely)?
OR
What is since the linear regression model assumes the dependent variable is predicted by the independent variable, reversing this would lead to biased results by violating this assumption?
OR
What is the model would often predict values outside the original data range and would thus be unreliable?
This is the idea that given any collection of sets, with each set containing at least one element, that it is possible to construct a new set by choosing a single element from each of the sets, even for an infinite collection of sets.
What is the Axiom of Choice?