Statistics Test...

The arithmetic mean of 5 numbers is 27. lf one of the number is excluded the mean of the  remaining number is 25. Find the excluded number.

The bar graph shows the number of cakes sold at a shop in four days. What is the difference in number of cakes between the highest and the lowest daily sale?

The mean of $$20$$ observations is $$15$$. One observation $$20$$ is deleted and two more observations are included to the data. If the mean of new set of observations is $$15$$, then find the sum of the two new observations included.

If $$1 - 5, 6 - 10, 11 - 15, 16 - 20, ...$$  are the classes of a frequency distribution then the lower boundary of the class $$11 - 15$$ is _____

An orderly distribution of the raw data into certain specified categories is known as

If $$1 - 5, 6 - 10, 11 - 15, ...$$  are the classes of a frequency distribution then the size of the class is _____

The range of $$8, 17, 28, 16, 30, 28, 15, 5, 19$$ and $$35$$ is _____

The class mark of a class is $$25$$ and if the upper limit of that class is $$40$$ then its lower limit is _____

The lower limit and upper limit of an exclusive class interval are $$15$$ and $$25$$ respectively. Then the class mark is _____