Measures of Cen...

Find the first quartiles for the following data.
$$8, 11, 20, 10, 2, 17, 15, 5, 16, 15, 25, 6, 5$$

Find the weighted mean of marks obtained by a student in certain examination if he has secured $$75,80,67,90$$ marks in English, Tamil, Mathematics, social Science respectively, having corresponding weights $$3, 2, 2, 1.$$

Marks	10-20	20-30	30-40	40-50	50-60
Frequency	4	10	20	40	50

The following frequency distribution shows the marks obtained by $$124$$ students in Economy at a certain school. Find the arithmetic mean using the direct method.

During the first period in the class, Elsa's math quiz scores were $$90, 92, 93, 88, 95, 88, 97, 87$$ and $$98$$. What was the median quiz score?

Find the mode of the following data

Choose the formula used for arithmetic mean of grouped data by Assumed mean method is

Identify in which ideal measure of central tendency used to find the middle value, if the data are ordinal?

Which ideal measure of central tendency used to find the middle value, if the data are categorical?

The lower quartile is the value of the middle of the first set, where $$25\%$$ of the values are _____ than $$Q_1$$ and $$75\%$$ are larger.

The ______ is the median of of the lower half of the data set.