Question

rylan is testing 2 different types of nail polish on her fingernails to determine which one lasts longer. she purchases Brand A and Brand B from the drug store. She then paints her nails with Brand A and her sister's nails with Brand B. She compares the nails polish at the end of the week and determines that Brand B last longer because there fewer chips than Brand A. Why is her conclusion not valid?

Answer 1

Because she and her sister may have done different activities which would have possibly damaged the nail polish differently

Answer 2

b

Explanation:

She painted her sister's nails with Brand B, not her own nails.