Arazorblade manufacturer wants to test responses to a new blade for heavy beards. what is the best sample for an experiment?
a. a random sample from all people of all ages
b. a random sample of men with beards
d. a random sample of all people who shave
c. a random sample of men who shave and have a heavy beard

Option C -  a random sample of men who shave and have a heavy beard

Step-by-step explanation:

Any sample must be a true representative of the sample. The razorblade manufacturer wants to test responses to a new blade for heavy beards.  Hence, the sample must include both the attributes. The best sample for the experiment would be a random sample of men who shave and have a heavy beard.

Hope it helps.

Thank you !!

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