The drug was tested on a group of 50,000 elderly patients who had cancer. The tumors in most of the patients did not respond to the treatment.

The scientists concluded that the drug was not effective in fighting cancer.

What is the most important problem with the design of this investigation?

the sample size is too small to be valid

The bottom one.

The sample size is too small to be valid

Explanation:

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )