Final answer:
Mohammed's mean price for the used CDs is $8, and the median price is $8.25, calculated by halving Malamud's mean and median prices.
Step-by-step explanation:
The task involves calculating the mean and median prices Mohammed paid for the used CDs. Since Mohammed paid half the price for each CD that Malamud did, we can calculate Mohammed's mean and median by simply halving Malamud's values.
The mean price Malamud paid for the CDs is $16. Therefore, the mean price for Mohammed will be $16 / 2 = $8. The median price Malamud paid is $16.50, hence the median price for Mohammed will be $16.50 / 2 = $8.25.
In conclusion, the mean price Mohammed paid for the used CDs is $8, and the median price is $8.25.