n = 65 California boys. It was used to predict 18-year old height from 6-year old height.
- At age 6, the average height was 46 inches with a standard deviation of 1.7 inches
- At age 18, the average height was 70 inches with a standard deviation of 2.5 inches
- r = .80
use this information to determine the LSRL
d that 70% of adults go to the doctor for their yearly checkup. If you want to test the validity of this claim, how many adults must be surveyed in order to be 90% confident that the sample percentage is in error by no more than 5 percentage points?
estigate this statement. In his samaple of 20 employed workers.
1 how many would you expect to have a drug problem? What is the standard deviation.
2. What is the likelihood that none pf the workers sampled has a drug problem?
3. What is the likelihood at least one has a drug problem