Question

the manager of a toy company wants to find out how many defective toys are produced by his company each year. as a sample for the survey, he plans to examine the first 100 toys made on a monday morning. why might this group of toys not be a valid sample? check all that apply. the sample should be all the toys produced. the sample should represent all the toys produced throughout the day, not just the first 100. the sample should only be 10 toys. the sample should represent an entire week or month, not just a single day. the manager cannot tell if a toy is defective.

Explanation:

A valid sample should represent the entire population of interest. In this case, the population is all the toys produced by the company each year. Examining only the first 100 toys made on a Monday morning is not representative as it doesn't account for toys made at other times of the day, other days of the week, or other weeks of the month and year. Also, a sample size of just 100 toys may not be sufficient to accurately estimate the number of defective toys in the whole - year production.

Answer:

The sample should represent all the toys produced throughout the day, not just the first 100.
The sample should represent an entire week or month, not just a single day.
The sample should not just be 10 toys.
The sample should be all the toys produced.
The manager cannot tell if a toy is defective.