Data Collection

Q.

What is the key objective of data analysis?

Q.

The probability that a person will hit a target in shooting practice is $0.3$ If he shoots $10$ times, then the probability of his shooting the target is

1. $1$

2. $1-{\left(0.7\right)}^{10}$

3. ${\left(0.7\right)}^{10}$

4. ${\left(0.3\right)}^{10}$

Q.

Find the probability that when a couple has three children, at least one of them is a girl. (Assume that boys and girls are equally likely.)

Q. Plot a double bar graph using the given data and answer the following: [4 MARKS]

(i) Which city has the largest difference in the minimum and maximum temperature?

(ii) Which is the hottest city and which is the coldest city?

(iii) Name two cities where maximum temperature of one was less than the minimum temperature of the other.

(iv) Name the city which has the least difference between its minimum and the maximum temperature.

Q. The double bar graph shows the average monthly temperatures of two cities over 4 months period. Read the graph carefully and answer the questions given below:


(i) What was the average monthly temperature in Dehradun in March
(ii) What was the average monthly temperature in Delhi for the whole 4 months?

Q. Observe the following bar graph and find the difference (in ${}^{\circ }C$)between the maximum temperatures of Panchgani and Chandrapur?

1. 5
2. 6
3. 10
4. 8

Q. The table given shows details of types of vehicles present in the basement of an apartment in different rows. Each picture of a vehicle represents 5 vehicles. According to the table shown, how many vehicles are parked in the basement of the apartment?

1. 18
2. 25
3. 90
4. 8

Q. In the table given below, the favorite fruits of class VII students are represented by tally marks.

Find the total number of students who like mango and banana.

1. 42

Q. The double bar graph shows the average monthly temperatures of two cities over 4 months period. Read the graph carefully and answer the questions given below:


(i) What was the average monthly temperature in Dehradun in March
(ii) What was the average monthly temperature in Delhi for the whole 4 months?