| Tag | Value |
|---|---|
| file | Descriptive-statistics_uva-standard-deviation-376-en_uva-standard-deviation-376-en |
| name | uva-standard-deviation-376-en |
| section | Descriptive statistics/Summary Statistics/Measures of Spread/Standard Deviation |
| type | schoice |
| solution | FALSE, TRUE, FALSE, FALSE |
| Type | Calculation |
| Language | English |
| Level | Statistical Literacy |
| IRT-Difficulty | 4.135 |
| p-value | 0.0933 |
X is a stochastic variable with mean 30 and standard deviation 4. Y is a stochastic variable with mean 20 and standard deviation 5. X and Y are independent. Then the standard deviation of 3 X - Y equals