Statistics

What is the class mark for the interval $10 - 30$?

Which of the following describes 'raw data'?

If the class size is $5$ and the upper limit of a class is $20$, what is the lower limit?

Systematic arrangement of data in rows and columns is called:

The range of first seven natural numbers is:

If the total frequency is $40$ and the frequencies of four classes are $x, 2x, 3x, 4x$, what is the frequency of the third class?

What is the true lower limit of the class $40 - 44$ in an inclusive frequency distribution?

When converting an inclusive frequency distribution $10-14, 15-19, 20-24$ into an exclusive one, the length of the class interval $15-19$ becomes:

The total number of observations in a frequency table is $N$. If the cumulative frequency of the last class is $k$, then:

If the mean of $x, x+2, x+4$ is $12$, then the mean of $x-1, x+1, x+3$ is:

In the frequency polygon shown, what is the class mark of the third class?

The point of intersection of 'Less than' and 'More than' ogives gives the:

Which of the following is NOT required to draw a histogram?

The width of the class interval $15.5 - 20.5$ is:

Identify the upper quartile ($Q_3$) from an ogive with $N=80$.

The following frequency polygon shows the marks of students. What is the total number of students?

To convert a frequency distribution from inclusive to exclusive form, if the gap is $g$, we subtract ___ from lower limits and add ___ to upper limits.

A histogram is constructed for a dataset. If the frequency of each class is doubled, which of the following remains unchanged in the graphical representation?

For a distribution of monthly salaries, the median is $Rs 45,000$. If every employee receives a $Rs 5,000$ raise, how will the ogive change?

While drawing a histogram for the data shown, a 'kink' or zig-zag line is often drawn on the x-axis. What is the purpose of this kink?

Calculate the mean of the first four odd natural numbers.

Find the median of the numbers $8, 1, 6, 2, 5, 4, 7$.

If the mean of $2, 4,$ and $x$ is $6$, find $x$.

Find the median of $2.2, 1.1, 4.4, 3.3, 5.5$.

The observations $4, 7, 10, x, 15, 16, 20$ are arranged in ascending order. If the mean of these observations is equal to its median, find the value of $x$.

Determine the median of the following fractions: $\frac{1}{2}, \frac{1}{3}, \frac{1}{4}, \frac{1}{5}$.

What is the mean of the first $10$ natural numbers?

The mean of $x-5y, x-3y, x-y, x+y, x+3y, x+5y$ is:

The mean of a set of 20 observations is 45. If two observations 50 and 60 are discarded, find the mean of the remaining observations.

If the median of $x, \frac{x}{2}, \frac{x}{3}, \frac{x}{4}, \frac{x}{5}$ is 6 (where $x > 0$), what is the mean of these five numbers?