#### A Bar graph is a pictorial representation of the numerical data by a number of bars (rectangles) of uniform width erected vertically (or horizontally) with equal spacing between them.

#### When the information was collected by the investigator herself or himself with a definite objective in her or his mind, the data obtained is called primary data.

When the information was collected by the investigator herself or himself with a definite objective in her or his mind, the data obtained is called primary data.

#### The monthly pocket money (in rupees) of six friends is given below: 40, 50, 65, 25, 70, 35. The highest and lowest pocket money are respectively ____.

Given,40, 50, 65, 25, 70, 35 The data given above is raw data, so by arranging in ascending order we will get 25, 35, 40, 50, 65, 70 the highest pocket money = Rs 70 the lowest pocket money = Rs 25 Hence, the highest pocket money and the lowest pocket money are respectively Rs 70 and Rs 25

#### The number of numbers which are greater than 5 and less than 13 from the data 4, 5, 7, 3, 8, 10, 11, 12, 15, 17, 16 is _____

Given 4, 5, 7, 3, 8, 10, 11, 12, 15, 17, 16 Numbers greater than 5 and less than 13 are 7, 8, 10, 11, 12 hence, the required number is 5.

#### The frequency of 9 in the following data: 5, 12, 9, 6, 11, 9, 4, 9, 3, 8, 9, 9 and 10 is ____.

Given 5, 12, 9, 6, 11, 9, 4, 9, 3, 8, 9, 9, 10 Frequency of 9 is 5 (∵ 9 appears 5 times in the given data).

#### The primary source of basic data is ____.

The data collected from a person through interview is called source. Hence, the primary source of basic data is Questionnaire.

#### The blood groups of 10 students of class X are recorded as follows: A, B, O, O, AB, A, AB, O, AB, O. The frequency of blood group O is____.

Given A, B, O, O, AB, A, AB, O, AB, O Hence, the frequency of O is 4 (∵O is repeated 4 times)

#### Runs made by 10 batsmen in the last 10 matches are 43, 69, 75, 94, 33, 38, 29, 85, 76, 39. The number of batsmen who scored more than half-century is ____.

Given 43, 69, 75, 94, 33, 38, 29, 85, 76, 39 are the runs made by batsmen. Hence, the number of batsmen who scored more than half-century = 5

#### The frequency of 30 in the given data, 23, 30, 37, 30, 30, 43, 48, 59, 30, 39 is ____.

Given values are 23, 30, 37, 30, 30, 43, 48, 59, 30, and 39 Frequency of 30 is 4 (∵30 repeated 4 times)

#### Frequency polygon is formed by joining the mid points of the adjacent rectangles in a histogram with line segments.

Frequency polygon is formed by joining the mid points of the adjacent rectangles in a histogram with line segments.