Free Data Handling 02 Practice Test - 6th grade
If you want to throw a birthday party and invite all your friends, which of the following can be useful data?
Number of friends
Last name of your friends
Estimated amount to be spent on each friend.
Height of your friends.
Solution : A and C
Last name, height and weight of your friends are of course not relevant for planning the party. But according to the number of friends, you will get snacks, arrange for space etc. Also, if you know the expected amount to be spent on each friend, you can ask for sufficient money from your dad.
Organisation of data means
rearranging it randomly.
making it complex so that nobody else can understand it except you.
making it easy to analyse.
all of the above
Solution : C
Organisation of data means arranging it in such a way that it is easy to analyse. If the data is in numeral form, it is advised to arrange it in either ascending or descending arrangement.
In a numerical data set , how should the numbers be arranged in order to find the highest and lowest values.
Arrange them in ascending or descending order
Arrange only in descending order
Arrange them randomly
Solution : A
If you record the data in ascending or descending order, it will be organised and hence, it's analysis will be much easier.
The following Pictograph gives us the number of hours required to finish the course of a subject before an exam. From this, you analyse that the subject that takes most no. of hours is
If you count the number of hours, it is as:
English5 X 2 = 10 hoursMathematics7 X 2 = 14 hoursPhysics4 X 2 = 8 hoursChemistry3 X 2 = 6 hoursBiology4 X 2 = 8 hours
So, Mathematics takes most and Chemistry takes least.
In bar graphs, the bars can only be drawn horizontally.
Solution : B
A bar graph is a chart that uses bars to show comparisons between categories of data. The bars can be either horizontal or vertical. Bar graphs with vertical bars are sometimes called vertical bar graphs. In a bar graph, bars have a uniform width and uniform spacing between them. The bars of uniform width can be drawn horizontally or vertically depending upon convenience. Hence, the given statement is false.
In the pictograph given below, the number of bikes sold in different months is shown. What is the number of bikes sold in the month, 2 months before the month which had the maximum number of bikes sold?
Solution : B
In the given pictograph it is mentioned that 1 bike picture is equal to 10 bikes. Therefore the month which has the maximum number of sales is January 2015. November 2014 is the month which was two months before January 2015.
For November 2014,
sales = 10+102=15
Thus, 15 bikes sold in November 2014, 2 months before the month which had the maximum number of bikes sold.
The bar graph below gives the strength of 'Section A' consecutively for 6 years since 2009, when it was Class 6, Section A. Each year, same students get promoted to next class. Also, some of the students get new admission and some of the students get transferred. So, the number of students varies accordingly.
Here the horizontal axis is x-axis which represents class and vertical axis is y-axis which represents number of students. The scale for x-axis is 1 cm = 1 class and y-axis 1 cm = 10 students.
How many students got admitted to the class at the start of session 2012 if nobody from the previous year batch took a transfer and 2 students were not promoted?
Solution : C
Number of students in the class in session 2011; Class 8 Section A = 40
If nobody took transfer and 2 students were not promoted, number of old students = 40 - 2 = 38
Number of students in the class in Session 2012; Class 9 Section A = 45
Number of new students = 45 - 38 = 7 students.
A pictograph provides
In pictographs, the information is represented in form of pictures of objects. The number of pictures shows the quantity of a given data.
The following bar graph represents the sales of different fruits from a stall in a day. Find the difference in sales between the most and the least popular fruit.
Here the horizontal axis is x-axis and it represents fruits and the vertical axis is y-axis and it represents the fruits sold in kgs. x-axis represents fruits and the scale for y-axis, 1 cm = 5 kg.
Solution : D
The most popular fruit is 'Banana'
The quantities of Banana sold = 30 Kg
The most popular fruit is 'Guava'
The quantities of Guava sold = 10 Kg
Difference = 30 Kg - 10 Kg = 20 Kg
Hence, the difference in sales between the most popular fruit and least popular fruit is 20 Kg.
Organising data makes it easier to read.
Solution : A
Organising data makes finding relevant information easier and hence makes the data more useful. Thus, the statement given above is true.