| Tag | Value |
|---|---|
| file | Descriptive-statistics_uva-standard-deviation-155-en_uva-standard-deviation-155-en |
| name | uva-standard-deviation-155-en |
| section | Descriptive statistics/Summary Statistics/Measures of Spread/Standard Deviation |
| type | schoice |
| solution | FALSE, TRUE, FALSE |
| Type | Calculation |
| Language | English |
| Level | Statistical Literacy |
| IRT-Difficulty | 3.988 |
| p-value | 0.1269 |
On a given exam, the mean score equals 20.5 with a variance equal to 9. Someone with a score of 22 then has a z-score equal to