| Tag | Value |
|---|---|
| file | Descriptive-statistics_eur-descriptive-406-en_eur-descriptive-406-en |
| name | eur-descriptive-406-en |
| section | Descriptive statistics/Score interpretation/z-score, Distributions/Continuous/Normal |
| type | num |
| solution | 0.47 |
| tolerance | 0 |
| Type | Data manipulation, Interpreting output |
| 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.
What is the probability of a total score of 13.0 or lower under the assumption that the scores come from a normally distributed population? (3 decimals)
Open the dataset below to answer this question:
The probability of a total score of 13.0 or lower is 0.47 when we assume normality (use the cdf.normal function to calculate the p-values and then look up the p-value associated with a score of 13).