Representing Data Using Tally Marks

Q. A table in which the number of tally marks indicates the _________ is called a __________ table.

1. average, frequency.
2. average, average.
3. frequency, average.
4. frequency, frequency.

Q.

Prepare the frequency distribution table for the given set of scores:

39, 16, 30, 37, 53, 15, 16, 60, 58, 26, 28, 19, 20, 12, 14, 24, 59,

21, 57, 38, 25, 36, 34, 15, 25, 41, 52, 45, 60, 63, 18, 26, 43, 36, 18,

27, 59, 63, 46, 48, 25, 33, 46, 27, 46, 42, 48, 35, 64, 24.

Take class intervals as (10 -20), (20 − 30), … and answer the following:

(i) What does the frequency corresponding to the third class interval mean?

(ii) What is the size of each class interval? Find the midpoint of the class interval 30- 40.

(iii) What is the range of the given set of scores?

Q. Tallies are usually marked in groups of _______

1. four
2. five
3. three
4. six

Q.

The following are the marks scored in a unit test (out of 25). Prepare a frequency distribution table, taking the class intervals as 0-4, 5-9, 10-14, 15-19, 20-24:

21, 14, 3, 7, 23, 18, 24, 16, 18, 17, 20, 10, 17, 18, 21, 23, 19, 12, 14, 9, 16, 18, 12, 14, 11.

From the table (i) find the mid-points of each class interval; (ii) find the class interval having maximum frequency; (iii) find the range of the scores.

Q. The marks obtained by 27 students of std 8 in a test of 10 marks are given below. Find the mean of the data.

5, 2, 4, 8, 9, 4, 5, 6, 7, 2, 5, 5, 9, 7, 7, 5, 7, 8, 9, 2, 2, 4, 5, 6, 7, 4, 2

1. 
2. 
3. 
4. 

Q. The number of Science and Mathematics projects submitted by Model high school, Balak Vihar in last 17 years at the state level science exibition is : 4, 1, 5, 3, 1, 5, 4, 2, 3, 1, 3, 5, 4, 3, 2, 2, 3, Find the mean of the data.

1. 5
2. 3
3. 7
4. 9

Q. In frequency distribution table tally marks of scores helps to count the ________.

1. only negative value of the scores
2. frequency of the scores.
3. only positive value of the scores
4. only extreme values of the scores

Q. The given tally mark denote which number

1. 7
2. 8
3. 6
4. 9

Q. The following data shows the number of saplings planted by 17 students. Using tally marks create the frequency table.

1, 2, 3, 4, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 3

1. 
2. 
3. 
4. 

Q.

Find the mean of all factors of $10$?

Q.

The data represents the body mass index​ (BMI) values for $20$ females. Construct a frequency distribution beginning with a lower class limit of $15.0$ and use a class width of $6.0$. Does the frequency distribution appear to be roughly a normal​ distribution?

$$\begin{gathered} 17.7,29.4,19.2,27.5,33.5 \\ 25.6,22.1,44.9,26.5,18.3 \\ 22.4,32.4,24.9,28.6,37.7 \\ 26.1,21.8,21.2,30.7,21.4 \end{gathered}$$

Q. Arithmetic mean of a given data from a frequency table is given by

1. $\frac{\sum \left(f_i/x_i\right)}{\sum f_i}$
2. $\frac{\sum \left(f_i{x}_i^2\right)}{\sum f_i}$
3. $\frac{\sum \left(f_i{x}_i\right)}{\sum f_i^2}$
4. $\frac{\sum \left(f_i{x}_i\right)}{\sum f_i}$

Q.

1. 3.3
2. 3.2
3. 3
4. 3.1

Q. Which of the following is the correct expression for lower class limit? ($m$ = class midpoint, $u$ = upper class limit, $l$ = lower class limit)

1. $l$ = $m$ - 2$u$
2. $l$ = $m$ -$u$
3. $l$ = 2$m$ +$u$
4. $l$ = 2$m$ -$u$

Q.

In MS Outlook, press -------------------------- key to use help window

Q. Choose the word/phrase which is opposite in meaning to the italicized bold word/phrase in the sentence.
He has been commended for all that he did.

1. censured
2. rejected
3. condemned
4. dismissed

Q.

Add $-408$ and $291$

Q.

A class has 20 students whose ages (in years) are as follows:​

14, 13, 14, 15, 12, 13, 13, 14, 15, 12, 15, 14, 12, 16, 13, 14, 14, 15, 16, and 12. ​

Find the mean age of these students.

Q. Find the assumed mean , if $\overline{X}=23,y=4,=\overline{u}=0.5$

1. $21$
2. $-21$
3. $25$
4. $-25$

Q. Data available in an unorganised form is:

1. Data
2. Raw Data
3. Pictograph
4. Bar Graph

Q. _____ the Prime Minister ever ____(visit) your village