Data

Q.

What are primary data and secondary data? which of the two is more reliable and why?

Q.

What is the primary data? What are the advantages and disadvantages of primary data over secondary data?

Q.

Range of data 70, 65, 71, 36, 55, 61, 62, 41, 40, 39, 35 is

1. 35

2. 71

3. 70

4. 36

Q.

What is the range of the first $10$ prime number?

Q.

A data is such that its minimum value is 86 and range is 32, then the maximum value is

1. 181

2. 54

3. 811

4. 118

Q.

What is unpublished data? -

Q.

The difference between the highest and the lowest values in the given data is called the 'range' of the data.

1. True

2. False

Q. Median of the numbers 3, 4, 5, 6, 7 is:

1. 5
2. 7
3. 4
4. 6

Q.

Find the median of the following :

$58,55,52,53,59,56,54,57,53,51,50,54,51,50,56,50,58$

Q.

What percent is $8paiseofRs.8$.

Q. Bar graph is a graphical representation of a grouped frequency distribution with continuous classes.

1. False
2. True

Q. The range of the data $15,20,6,5,30,35,93,34,91,17,83$, is ___.

1. 90
2. 78
3. 88
4. 92

Q. Question 2
Classify the data given below as primary or secondary data.

1. Number of females per 1000 males in various states of our country

2. Weights of students of our class

3. Production of wheat in the last 10 years in our country

4. The number of plants in our locality

5. Rainfall in our city in the last 10 years

Q.

If the range of the data is 36 and the maximum value is 71, then the minimum value is

1. 36

2. 71

3. 35

4. 37

Q.

The number of times a particular item occurs in a given data is called its

1. cumulative frequency

2. class-size

3. variation

4. frequency

Q.

To get the census of the country, the government collected data from hospitals for the number of births and deaths of people. What kind of data is this?

1. Primary

2. Secondary

3. Tertiary

4. None of these

Q.

define frequency

Q.

Question 7 (i)
The value of $\pi$ up to 50 decimal places is given below:
3.14159265358979323846264338327950288419716939937510
(i) Make a frequency distribution of the digits from 0 to9 after the decimal point.

Q. What are the groups into which large data is condensed called?

1. Class limits
2. Classes
3. Class size
4. Class width

Q.

Give five examples of data that you can collect from day to day life.

Q. The range of the data $15,20,6,5,30,35,93,34,91,17,83$, is ___.

1. 78
2. 90
3. 88
4. 92

Q. Given below is a table which shows the yearwise strength of a school. Represent this data by a bar graph.
$\begin{array}{cccccc}\text{Year}& 2012-13& 2013-14& 2014-15& 2015-16& 2016-17\\ \text{No. of students}& 800& 975& 1100& 1400& 1625\end{array}$

Q.

Give five examples of data that you can collect from your day-to-day life

Q. Question 12
The annual rainful record of a city for 66 days is given in the following table.
$\begin{array}{ccccccc}Rainfall\left(incm\right)& 0-10& 10-20& 20-30& 30-40& 40-50& 50-60\\ Numberofdays& 22& 10& 8& 15& 5& 6\end{array}$
Calculate the median rainfall using ogives (or move than type and of less than type)

Q. Calculate the range and coefficient of range from the following data:
The heights of $10$ children in $cm:122,144,154,101,168,118,155,133,160,140$

Q.

When the information is collected from a source which already has it gathered, such data is called as secondary data. True or False?

1. False

2. True

Q. The range of the data: 11, 22, 33, 44 is:

1. 33
2. 22
3. 44
4. 30

Q.

Match the two columns.
$\begin{array}{ccc}& \text{Column-I}& \text{Column-II}\\ & \text{(A) Data which is collected for the first time by the statistical}& \text{(p) Secondary data}\\ & \text{investigator or with the help of his workers is called}& \\ & \text{(B) These are the data already collected by a person or a}& \text{(q) Variable}\\ & \text{society and these may be in published form.}& \\ & \text{These data should be carefully used.}& \\ & \text{(C) When the data is compiled in the same form and order in}& \text{(r) Primary Data}\\ & \text{which it is collected, it is known as}& \\ & \text{(D) A quantity which can vary from one individual to another is}& \text{(s) Raw Data}\\ & \text{called}& \end{array}$

Choose the correct option:

1. A-r; B-s; C-q; D-p

2. A-r; B-p; C-s; D-q

3. A-s; B-p; C-r; D-q

4. A-q; B-r; C-p; D-s

Q. Mark the correct alternative in each of the following:
Tally marks are used to find

(a) class intervals

(b) range

(c) frequency

(d) upper limits

Q. Find the range of the data : 22, 15, 19, 18, 25, 7, 10, 5, 12, 14, 24, 17, 27, 1