Chi–Squares
When interpreting a correlation coefficient close to -1, what can you conclude about the relationship between two variables?
A study wants to investigate whether there is an association between educational attainment (high school, college, graduate) and employment status (employed, unemployed). Which chi-squared test should be used?
If an outlier significantly impacts the mean but not the median of a dataset, which measure of center should be used to evaluate the robustness of a statistical model predicting home prices in a neighborhood with one extremely expensive man...
To establish causality between two variables what kind of study should be conducted?
If a scatterplot of data points shows a linear pattern, which statistical measure would best describe the strength and direction of the relationship between the variables?
If a survey is conducted with a larger sample size, how will the width of the confidence interval for the population mean most likely change?
When increasing the sample size in a study while maintaining the same level of confidence, what is the effect on the width of the confidence interval?
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What inferential statistic technique would likely yield most precise confidence interval estimate population mean given large sample size normal population distribution known standard deviation?
A company wants to compare the proportion of defective products produced by two different assembly lines. Which chi-squared test should be used?
If a study shows a strong correlation between the number of hours students studied and their test scores, which statement best illustrates why this relationship may not imply causation?