Statistics Wrap-up for TEFL

What is the main difference between a population and a sample?

• A population includes everyone in a group, while a sample is a subset of that group.

• A population is smaller than a sample.

• A sample and a population are always the same size.

• A sample refers to data collected from a survey only.

If you want to study how effective your teaching method is across all your classes, which approach would be best?

• Use data from every student in every class.

• Select a few students from each class to represent the group.

• Only use data from the highest-performing students.

• Study the results of only one class.

Which of the following is an example of qualitative data?

• Test scores in a vocabulary quiz.

• The number of students attending class.

• Feedback about whether students enjoy group activities.

• Time spent on homework.

What is the most important factor in designing a survey?

• Making the survey as long as possible.

• Asking clear and focused questions.

• Using only open-ended questions.

• Avoiding anonymity.

If your students scored 40, 50, 60, 70, and 100 on a test, what is the median score?

• 60

• 70

• 64

• 55

Why might the median be more useful than the mean in some cases?

• The median always provides a larger value than the mean.

• The median is not affected by extremely high or low scores.

• The median is easier to calculate than the mean.

• The median includes all data points in its calculation.

If the range of your test scores is 80 and the lowest score is 20, what is the highest score?

• 60

• 80

• 100

• 120

What does a high standard deviation indicate about your students' test scores?

• The scores are very close to each other.

• There is a lot of variation in the scores.

• The mean is very high.

• All students performed similarly.

If you randomly select one student from a class of 30, what is the probability of choosing a specific student?

• 1/15

• 1/20

• 1/30

• 1/10

What does it mean if the probability of an event is 0?

• The event is very likely.

• The event is impossible.

• The event will definitely happen.

• The event is rare but possible.