Descriptive Statistics Test 9

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Descriptive Statistics Test 9

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Weekly Quiz Competition

Question 1
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The line graph shows the income of RBI department. In which of the years was the annual income the minimum?

A
$$1995$$

B
$$1999$$

C
$$2000$$

D
$$2001$$

Solution

In graph shows the income of the RBI department was minimum in the year $$1995$$.
Question 2
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Directions For Questions

The frequency curve shows temperatures over $$11$$ year in Bangalore. Use the graph to answer the questions below.
Which year had the lowest temperature?

...view full instructions

How many years have temperature higher than $$35^{o}C$$?

A
$$2$$

B
$$3$$

C
$$4$$

D
$$5$$

Solution

Years $$2002$$ and $$2005$$ are having the temperature higher than $$35^{o}C$$.
Thus answer is $$2$$.
Question 3
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The line graph shows the number of students in each department of a school. What does the first number in the ordered pair $$(8, 30)$$ represent?

A
Number of department

B
Line graph

C
Number of students

D
School department

Solution

The first number in the ordered pair $$(8, 30)$$ represent $$8$$ number of departments.
Question 4
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Directions For Questions

The frequency curve shows the number of students ages $$11$$ through $$17$$ in Chennai city that have mobile phones. Refer to the frequency curve below to answer each question.

...view full instructions

In which age students do have the least number of mobile phones?

A
$$11$$

B
$$12$$

C
$$13$$

D
$$14$$

Solution

$$12$$ years old students have the least number of mobile phones.
Question 5
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The frequency curve shows the number of students ages $$11$$ through $$17$$ in Chennai city that have mobile phones. Refer to the frequency curve below to answer each question.
How many mobile phones do $$13$$ year-old have?

A
$$10$$

B
$$15$$

C
$$20$$

D
$$25$$

Solution

$$13$$ year-old have $$15$$ mobile phones as shown in the graph.
Question 6
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The graph above shows the student participation for $$4$$ school clubs. Each student is allowed to participate in only one club. If the school has $$250$$ students, calculate the number of students not in any club.

A
$$220$$

B
$$90$$

C
$$60$$

D
$$30$$

Solution

Debate $$\rightarrow 20$$, Student council $$\rightarrow 70$$, Orchestra $$\rightarrow 90$$, choir $$\rightarrow 40$$
Hence, total $$20+70+90+40=220$$
Total students in the school is $$250$$.
Hence, the number of students not in any club is $$250-220=30$$.
Question 7
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Directions For Questions

The frequency curve shows the number of students ages $$11$$ through $$17$$ in Chennai city that have mobile phones. Refer to the frequency curve below to answer each question.

...view full instructions

About how many mobile phones do $$14\dfrac{1}{2}$$ year old have?

A
$$20$$

B
$$30$$

C
$$40$$

D
$$50$$

Solution

On looking the graph, we can say $$14\dfrac{1}{2}$$ year old have 40 mobile phones.
Question 8
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The following line graph gives the ratio of the amounts of imports by a company to the amount of exports from that company over the period from $$1995$$ to $$2001$$.
The imports were minimum proportionate to the exports of the company in the year ?

A
$$1995$$

B
$$1996$$

C
$$1997$$

D
$$2000$$

Solution

The imports are minimum proportionate to the exports implies that the ratio of the value of imports to exports has the minimum value.
Now, this ratio has a minimum value $$0.35$$ in $$1997$$

Hence, the imports are minimum proportionate to the exports in $$1997$$.
Question 9
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Directions For Questions

The frequency curve shows temperatures over $$11$$ year in Bangalore. Use the graph to answer the questions below.
Which year had the lowest temperature?

...view full instructions

What is the range of temperatures in Bangalore over $$11$$ years?

A
$$20^{o}C$$

B
$$10^{o}C$$

C
$$33^{o}C$$

D
$$45^{o}C$$

Solution

Range of temperature = highest temperature $$-$$ lowest temperature
$$= 45 - 12 =$$ $$33^{o}C$$
So, the range of temperatures in Bangalore over $$11$$ years is $$33^{o}C$$.
Question 10
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Directions For Questions

The frequency curve shows the number of students ages $$11$$ through $$17$$ in Chennai city that have mobile phones. Refer to the frequency curve below to answer each question.

...view full instructions

At what age do students have the greatest number of mobile phones?

A
$$14$$

B
$$15$$

C
$$16$$

D
$$17$$

Solution

At the age $$16$$, the students have the greatest number of mobile phones.