関連ワード:  what is data in statistics class 9    what is raw data in statistics class 9    what is grouped data in statistics class 9    what is primary data in statistics class 9    what is data statistics class 9 ai    what is the role of collecting data in statistics class 9    what is primary data and secondary data in statistics class 9    what is data class 9    what is statistics class 9    types of data class 9