Question

dylan wanted to find the average number of hours per day that the students in his class practiced their instruments. he chose three students by drawing their names from a hat. what should he do to ensure that he has an accurate average for the class?
number of hours of practice each day
he should add the three numbers and divide by 3 because that is how one finds an average.
he should poll more students to eliminate the variability caused by a sample size that is too small.
he should take the middle number as his average since he has three observations.
he should just find the average of 0.5 and 4 since 0 does not change anything when adding.

Explanation:

A sample size of 3 is too small to accurately represent the whole class. Larger sample sizes generally reduce sampling variability and lead to more accurate estimates of population parameters like the average number of practice - hours. Taking the average of just 3 students may not reflect the true average for the entire class.

Answer:

He should poll more students to eliminate the variability caused by a sample size that is too small.