Descriptive Statistics Practice Questions
Central Tendency - correct answer ✔✔central/typical value around which data clusters
(mean, median, mode)
Descriptive Statistics - correct answer ✔✔used to describe data sets
used to visualize data
1st step in any statistical analysis
Variability - correct answer ✔✔measure of how much scores differ from the mean
Skew/Kurtosis - correct answer ✔✔shape of the spread (variability); distribution
Weighted Mean - correct answer ✔✔(bc mean is sensitive to outliers)
used to restore balance to over or underrepresented segments of a sample
Median - correct answer ✔✔value at which 50% of all scores fall below, and 50% fall above
Calculating the Median - correct answer ✔✔-rank order from lowest to highest
-find "middle" score, or average middles scores if sample size is even
1st Quartile (Q1) - correct answer ✔✔value at which 25% of all observations fall below
3rd Quartile (Q3) - correct answer ✔✔value at which 75% of all observations fall below
Percentiles (Uses) - correct answer ✔✔-used to get a feel for how spread out the data is and where most
of the observations are contained
Central Tendency - correct answer ✔✔central/typical value around which data clusters
(mean, median, mode)
Descriptive Statistics - correct answer ✔✔used to describe data sets
used to visualize data
1st step in any statistical analysis
Variability - correct answer ✔✔measure of how much scores differ from the mean
Skew/Kurtosis - correct answer ✔✔shape of the spread (variability); distribution
Weighted Mean - correct answer ✔✔(bc mean is sensitive to outliers)
used to restore balance to over or underrepresented segments of a sample
Median - correct answer ✔✔value at which 50% of all scores fall below, and 50% fall above
Calculating the Median - correct answer ✔✔-rank order from lowest to highest
-find "middle" score, or average middles scores if sample size is even
1st Quartile (Q1) - correct answer ✔✔value at which 25% of all observations fall below
3rd Quartile (Q3) - correct answer ✔✔value at which 75% of all observations fall below
Percentiles (Uses) - correct answer ✔✔-used to get a feel for how spread out the data is and where most
of the observations are contained
