Probability, Random Variables, and Probability Distributions
How should one interpret a strong positive correlation between consumption of whole grains and overall health in adults from an observational study?
A scatterplot showing residuals versus fitted values in a simple linear regression should ideally display what pattern to satisfy assumptions necessary for inference?
In a survey that asks respondents about their favorite ice cream flavor out of four choices, which measure of center would be most appropriate to report?
In descriptive statistics, what do we use standard deviation to describe?
Given distribution skewness and leptokurtosis, how might transformations techniques promote normalcy assumptions underpinning parametric inferential statistics?
If a random sample of size 40 is taken from a population, under what condition would the distribution of the sample mean be approximately normal?
Which graphical representation would generally be used for displaying frequency distribution of one categorical variable?
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What can be concluded if a set of data has a low standard deviation?
What statistic could help understand how much individual test scores deviate from an average test score?
If you roll a standard six-sided die, what is the probability of rolling an even number?