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For some data x₁, x₂, ...... xₙ with respective frequencies f₁, f₂, ..... fₙ, the value of Σfᵢ(xᵢ − x̄) from i=1 to n is equal to :
The middle most observation of every data arranged in order is called :
BINGO is game of chance. The host has 75 balls numbered 1 through 75. Each player has a BINGO card with some numbers written on it. The participant cancels the number on the card when number written on the ball selected at random. Whosoever cancels all the numbers on his/her card, says BINGO and wins the game. The table given below, shows the data of one such game where 48 balls were used before Tara said 'BINGO'.
Following distribution shows the marks of 230 students in a particular subject. If the median marks are 46, then find the values of x and y.
Following data shows the marks obtained by 100 students in a class test : | Marks obtained | 20 | 29 | 28 | 33 | 42 | 38 | 43 | 25 | | Number of students | 6 | 28 | 24 | 15 | 2 | 4 | 1 | 20 | The median will be the average of which two observations ?
The following table gives the daily income of 50 cab drivers of a particular city : | Income (₹) | 500 - 600 | 600 - 700 | 700 - 800 | 800 - 900 | 900 - 1000 | | No. of Drivers | 12 | 14 | 8 | 6 | 10 | Find the mean income and the modal income.
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