class 11

Math

Algebra

Statistics

All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ?

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The following tables shows the daily wages of works in a factory:

$100$ surnames were randomly picked up from a local telephone directory and a frequency distribution of the number of letters in the English alphabet in the surnames was found as follows:(i) Draw a histogram to depict the given information.(ii) Write the class interval in which the maximum number of surnames lie.

Find the mean salary of $60$ workers of a factory from the following table:

In a hospital, the ages of diabetic patients were recorded as follows. Find the median age.

Find the mean deviation about the mean for the data

Calculate mean deviation from the median of the following data: Class interval: 0-6 6-12 12-18 18-24 24-30 Frequency 4 5 3 6 2

The standard deviation of first 10 natural numbers is 8.25 (b) 6.5 (c) 3.87 (d) 2.87

Find the mean, median and mode of the following data: