List of top B.Ed. Mathematics Questions on Probability

Arrange the following in increasing order on the basis of dispersion of data with given mean, number of data points and sum of squares:
A. \(n=5,\ \sum x^2=100,\ \bar{x}=3\);
B. \(n=5,\ \sum x^2=100,\ \bar{x}=4\);
C. \(n=10,\ \sum x^2=100,\ \bar{x}=2\);
D. \(n=10,\ \sum x^2=100,\ \bar{x}=3\).

For the given dataset:
\[ \begin{array}{c|ccc} x & 2 & 3 & 4\\ \hline f(x) & \frac14 & \frac12 & \frac14 \end{array} \] Which of the following is the expected value of \(x\)?

In statistics, ANOVA stands for:

In a small factory one supervisor and four labourers work. The labourers draw salary of \(\rupee 5000\) per month each while supervisor gets \(\rupee 15000\) per month. Which of the following are mean and mode of the salaries?

In a small factory one supervisor and four labourers work. The labourers draw salary of \(\rupee 5000\) per month each while supervisor gets \(\rupee 15000\) per month. Which of the following are mean and mode of the salaries?

When a coin is tossed twice, which of the following is the probability of getting both tails?