سؤال في اختبار الاحصاء,,

[شمس الربيع]

u have the class limit 5 - 8.1
and the class width =lower class limit for the the 2nd class - lower class limit for the 1st class
lower class limit for the the 1st class=5
lower class limt for the snd class=8.1+1=9.1
so the class width=9.1-5-4.1