What is the frequency of the class 11-20 in the below given data?

You are given that the total number of observed values in a frequency distribution is 50 and the frequency of a given class 25-30 is 10. Also, the cumulative frequency of all classes above this given class is 40. The cumulative frequency for this class is

If the given data is represented as a group frequency table with classes 160 – 165, 165 – 170 etc., how many such classes are required?

20. If a class in a frequency distribution for a sample of 50 has a frequency of 5, the cumu- lative relative frequency for this class is

Consider the following frequency table representing the distribution of hours students study for an exam in a week.Hours Students Study for an Exam in a WeekClass Frequency8–158–158816–2316–234424–3124–31141432–3932–394440–4740–471010Copy DataStep 1 of 2 :  Determine the relative frequency for the third class as a simplified fraction.

From the given frequency table, find the class mark of the class interval having the highest frequency.