Basic statistics for educational research

Which is inferential statistics?

• mean

• standard deviation

• hypothesis testing

• graphs

What type of graph is it?

• boxplot

• histogram

• table

• scatter plot

Which one measures variability?

• mean

• mode

• median

• standard deviation

Which picture shows a normal distribution?

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Class A, B, C, and D all have the same average score. We are given the standard deviation (sd) of each class:
Class A: sd = 0.8 ; Class B: sd = 1.2 ; Class C: sd = 1.4 ; Class D: sd = 2
Which class has students whose scores are closest together?

• Class A

• Class B

• Class C

• Class D

Which one is H0?

• Learning motivation positively impacts academic performance

• There is no statistically significant difference in writing performance between students learning with AI and students learning with a teacher

• There is a positive correlation between student age and test scores.

• Students who study for longer hours will score higher on exams.

Which one is NOT a level of significance?

• 1%

• 5%

• 10%

• 100%

In hypothesis testing, when do we reject the null hypothesis (H0)?

• p-value < 0.05

• p-value < 0.5

• p-value > 0.05

• p-value > 0.5

In hypothesis testing, when do we accept the null hypothesis (H0)?

• p-value < 0.05

• p-value < 0.5

• p-value > 0.05

• p-value > 0.5

Which one is correct?

• population is the same as sample

• population is the subset of sample

• sample is the subset of population

• population and sample are unrelated