List of practice Questions

A survey conducted on 20 households in a locality resulted in the following frequency table. The mode of the data is:
The mode of the data \(5,\ 7,\ 9,\ 7,\ 11,\ 13,\ 7,\ 15,\ 17,\ 19\) is:
The value which occurs most frequently in a data set is called:

Find the mean and mode of the following data:

Class15--2020--2525--3030--3535--4040--45
Frequency1210151175
Mean, Median and Mode of a data are related by the relation
For a biased coin, the probability of head is 0.4.
The coin is tossed 1000 times. The standard deviation of the number of heads (rounded to 2 decimal places) is \(\underline{\hspace{2cm}}\).