Abstract
''The concept of hypothesis testing'', which is covered in Japanese high school mathematics, aims to teach informal statistical inference and hypothesis testing. In this research, we conducted a questionnaire survey of current Japanese mathematics teachers regarding their ''concepts on hypothesis testing.'' The results revealed that current Japanese mathematics teachers lacked understanding of informal hypothesis testing. Furthermore, it was found that approximately 30% of current Japanese mathematics teachers are aware that they have not mastered hypothesis testing. This tendency was especially noticeable among teachers in their 40s. In the future, it will be necessary to introduce the idea of informal hypothesis testing to current mathematics teachers and make it more widespread. Furthermore, how to develop and implement teaching materials that incorporate informal hypothesis testing is an issue for the future.
