JEE-Main - Grade 11 - Mathematics - Linear Inequalities - Importance and Snapshot of Linear Inequalities - Study ref# 617

Introduction:
In earlier classes, we have studied equations in one
variable and two variables and also solved some statement problems by
translating them in the form of equations. Now a natural question arises: ‘Is
it always possibl... read more

JEE-Main - Grade 11 - Mathematics - Statistics - Importance and Snapshot of Statistics - Study ref# 644

Introduction
We know that statistics deals with data collected for
specific purposes. We can make decisions about the data by analyzing and
interpreting it. We have studied the methods of finding a representative
value for the given data... read more

JEE-Main - Grade 11 - Mathematics - Statistics - Importance and Snapshot of Statistics - Study ref# 645

Following sections must be covered to understand the
Statistics:
1. Measure of Dispersion
2. Range
3. Mean Deviation
4. Variance and Standard Deviation
5. Analysis of Frequency Distribution... read more

JEE-Main - Grade 11 - Mathematics - Statistics - Target Setup for Statistics - Study ref# 646

Student requires to achieve the following milestones to get better grip over Statistics. The milestones / targets are as follows:-Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%Subject T... read more

Find the mean deviation about median for the following data:Note: We are to find the mean deviation about the median, so first of all median is to be calculated. It is a continuous data. So median can be calculated by using the formula &nb... read more

Calculate the mean deviation about median for the age
distribution of 100 persons given below.
Note: First make the class interval are of uniform length
and then use the formula , median . Answer:
Here, N= 100
&nb... read more

Find the mean, variance and standard deviation using
short-cut method.
Answer: Let assumed mean , A = 92.5, h = 5Mean =92.5+ = 92.5+ 0.5 = 93Variance =
Standard dev... read more

The mean and variance of eight observation are 9 and 9.25,
respectively. If six of the observations are 6,7,10,12,12 and 13, find the
remaining two observations. Answer: Let the remaining two observations are a and b.
Given, read more

Given is the
mean and is variance of n
observations .
Prove that the mean and variance of the observations
are and respectively, Answer: Mean of
... read more

There are 60 students in a class. The following is the
frequency distribution of the marks obtained by the students in a test:
where, is a
positive integer. Determine the mean and standard deviation of the marks. Answer: First find ... read more