| Tag | Value |
|---|---|
| file | Descriptive-statistics_vufsw-proportion-1279-en_vufsw-proportion-1279-en |
| name | vufsw-proportion-1279-en |
| section | descriptive statistics/summary statistics/proportion |
| type | schoice |
| solution | FALSE, FALSE, TRUE, FALSE, FALSE |
| Type | calculation |
| Program | calculator |
| Language | English |
| Level | statistical literacy |
The average income of a large sample of students who all work at a law firm is 500 euros (per month), with a standard deviation of 100 euros. The average income is normally distributed. What is the proportion of students with an income higher than 450 euros per month?
z = (450-500)/100 = 0.500 (it is half a sd from the mean). The Z Score Table shows for z = 0.50 the figure of 0.3085. This is the probability of an income below 450. Thus, the probability of an income higher than 450 euros per month is 1-0.3085= 0.6915.
If you want to know more about how to calculate this watch this clip
Language
Nederlands
Levels of Difficulty
Medium
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