| Tag | Value |
|---|---|
| file | Probability_uva-random-variables-431-en_uva-random-variables-431-en |
| name | uva-random-variables-431-en |
| section | Probability/Elementary Probability/Random variables |
| type | schoice |
| solution | FALSE, FALSE, TRUE, FALSE |
| Type | Calculation |
| Language | English |
| Level | Statistical Literacy |
| IRT-Difficulty | 3.155 |
| p-value | 0.2579 |
In 80 newborns, it was determined whether they had a low birth weight (< 2500 g.) and what the mother’s age was (under 20 or not). The results were as follows: Of the 20 mothers under 20 years of age 8 had a low birth weight baby, of the 60 mothers aged 20 years and older, 16 had a low birth weight baby. We randomly choose one of the 80 children. Suppose the child has a low birth weight. The probability that the mother is 20 years or older is