Statistics Test...

How many students are over $$170\:cm$$ tall?

How many employees get to work in more than $$100$$ minutes?

Convert the following data into grouped frequency table. Find the total frequency:
$$2, 3, 4, 12, 11, 2, 4, 3, 15, 15, 16, 2, 3, 20, 20$$

In which class interval number of ducks is equal to $$20$$ ponds?

$$70$$ number of student's height are measured in cm as shown in the histogram. How many students have heights more than $$180$$ cm?

How many employees get to work in less than $$20$$ minutes?

How many employees get to work in less than $$60$$ minutes?

How many number of ducks are there in less than $$60$$ ponds?

How many students have heights less than $$180$$ cm?

Convert the following data into grouped frequency table with class interval length of $$5$$. Find the third interval frequency:
$$12, 12, 11, 12, 2, 3, 3, 3, 4, 4, 2, 2, 5, 6, 7, 4, 7, 8, 15, 15, 20, 20$$