Question

10 POINTS AND I WILL MARK YOU THE BRAINLEST FOR THE CORRECT ANSWER

Answer 1

Part A:

It won't be helpful to your study, because most of the people in the grocery store might be wearing spectacles. But it can provide the random data only for the particular area and not the whole country. Hence it is not advised good to take such random data to study on.


Part B:

This wouldn't be a random sample. This is because taking samples from two cities wont provide the full data of the country but instead just a partial data of the whole data. Therefore it wouldn't be useful for collecting this random data.

Part C:

Yeah this could be helpful in surveying and studying. This is because the people are chosen from random directions and are scattered due to which the larger part of a country can be compared to this survey of 20 people. Therefore it is advisable to survey these 50 people from 20 states and study them.


Hope this helps!!
Cheers!!