Tally Marks

Q. Consider the following observation table:

Observation	Tally Marks	Frequency
1	||||	4
2	||||	5
3	|||	3
4	|||| |||	8
	Total frequency	20

What is the tally mark for the total frequency?

1. 
   |||| |||| |||| ||
2. 
   |||| |||| |||| ||||
3. 
   |||| |||| |||| ||||
4. 
   |||| |||| ||||

Q. The bar chart represents the data given in the frequency table shown below. For which year, the bar graph is incorrectly drawn?

1. 1995
2. 1996
3. 1997
4. 1998

Q. The frequency distribution table gives the data for the number of times a digit appears in a phone number:

Digit	Frequency
9	4
8	3
7	2
6	1

What would be the tally mark for 7's Frequency?

1. 
   ||||
2. 
   ||
3. 
   |||
4. 
   |

Q. 10 is represented as in tally marks. State whether the statement is True or False.

1. True
2. False

Q. 9 is represented as in tally marks. State whether the statement is True or False.

1. True
2. False

Q. Consider the following frequency distribution table:

Observations	Frequency	Tally Marks
10	3	|||
15	4	||||
20	X	Y
25	8	|||| |||

It is known that the total frequency is 20. What are the values of X andY?

1. 
   X = 3
2. 
   X = 5
3. 
   Y = ||||
4. 
   Y = ||||

Q. Find the correct dot plot reprsentation for each group of turtles from the table given below.

Group size of turtles	Number of times each group was sighted
30	4
45	2
60	7
75	1

1. 
2. 
3. 
4. 

Q.

Question 7
30 children were asked about the number of hours they watched TV programs last week. The results are recorded as under:

$\begin{array}{ccccc}\text{Number of hours}& 0-5& 5-10& 10-15& 15-20\\ \text{Frequency}& 8& 16& 4& 2\end{array}$

Can we say that the number of children who watched TV for 10 or more hour in a week is 22? Justify your answer.

Q. Following data gives the number of children in 40 families:

1, 2, 6, 5, 1, 5, 1, 3, 2, 6, 2, 3, 4, 2, 0, 0, 4, 4, 3, 2 2, 0, 0, 1, 2, 2, 4, 3, 2, 1, 0, 5, 1, 2, 4, 3, 4, 1, 6, 2

Represent it in the form of a frequency distribution.

Q. Compute the missing frequencies $f_1$ and $f_2$ in the following data if the mean is $166\frac{9}{26}$ and the sum of the frequencies is $52$

C.I	140-150	150-160	160-170	170-180	180-190	190-200	Total
Freq.	5	$f_1$	20	$f_2$	$6$	$2$	$52$

Q.

Tally marks are used to find :

1. Class intervals

2. Range

3. Frequency

4. Upper limit

Q.

The table shows the number of children in 35 families. How many families have more than 3 children?

1. 21

2. 14

3. 10

4. 31

Q. The scatter plot representing the number of hours spent by the students at the playground in a week is given below:
Calculate the total time spent by grade 7 students at the playgorund.

1. 21 hours
2. 10 hours
3. 8 hours
4. 13 hours

Q. The scatter plot representing the number of hours spent by the students at the playground in a week is given below:
Calculate the total time spent by grade 7 students at the playgorund.

1. 10 hours
2. 8 hours
3. 13 hours
4. 21 hours

Q.

Using tally marks, which one of the following represents the number eight?

1. $\left|\right|\left|\right|\left|\right|$

2. $\left|\right|||\left|\right|$

3. $\bcancel{\left|\right|\left|\right|}$ $\left|\right|$

4. $\bcancel{\left|\right|\left|\right|}$ $\left|\right||$

Q.

If the classes in a grouped frequency distribution are not continuous, we can make them continuous by finding half of the difference between the upper limit of a class and the lower limit of the next class, and then adding the same to all the lower limits and subtracting it from all the upper limits in the distribution.

1. True
2. False

Q.

In tally marks the symbol $\bcancel{\left|\right|\left|\right|}$ represents the number_____.

Q. Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school:

13, 14, 13, 12, 14, 13, 14, 15, 13, 14, 13, 14, 16, 12, 14 13, 14, 15, 16, 13, 14, 13, 12, 17, 13, 12, 13, 13, 13, 14

Q. The following table shows the marks obtained by students of a class in a math test (out of 10 marks).
Maximum number of students got marks.

1. 8
2. 7
3. 9

Q.

The data can be arranged in a tabular form by using ______ marks.