| Tag | Value |
|---|---|
| file | Descriptive-statistics_eur-descriptive-409-en_eur-descriptive-409-en |
| name | eur-descriptive-409-en |
| section | Descriptive statistics/Summary Statistics/Measures of Location/Mean |
| type | num |
| solution | 0.62 |
| tolerance | 0 |
| Type | Data manipulation, Interpreting output, Calculation |
| Program | SPSS |
| Language | English |
| Level | Statistical Literacy |
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.
Create a p_low group containing the 33.333% lowest scoring students on the total score [total score]. What is the proportion correct score of this group on item 8? (3 decimals)
Open the dataset below to answer this question:
The proportion correct of the p_low group on item 8 is 0.62. First a new variable has to be computed using the percentile scores and the recode into different variable function. After, find the mean of the p_low group on item8. This mean represents the proportion correct on this item.