| Tag | Value |
|---|---|
| file | Descriptive-statistics_eur-descriptive-404-en_eur-descriptive-404-en |
| name | eur-descriptive-404-en |
| section | Descriptive statistics/Score interpretation/z-score |
| type | num |
| solution | 3 |
| tolerance | 0 |
| Type | Data manipulation, Interpreting output |
| Program | SPSS |
| Language | English |
| Level | Statistical Thinking |
A knowledge test on alcohol contains 20 items and is administered to 202 high school students. The variable [total score] gives the total correct scores. Gender (0 = woman; 1 = man) and alcohol use (0 = very often; 1 = often; 2 = sometimes; 3 = never) are also included in the dataset.
How many students have a total score that is more than 2 standard deviations above the group mean? (no decimals)
Open the dataset below to answer this question:
The number of students with a total score that is more than 2 standard deviations above the mean is three (calculate z-scores and look for z-scores greater than 2).