Statistics Test

Result

Statistics Test - 23

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Weekly Quiz Competition

Question 1
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Data available in unorganized form is called

A
out comes

B
raw data

C
class

D
frequency

Solution

Data available in unorganized form is called raw data
Question 2
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Size of the class $$180 - 195$$ is

A
$$180$$

B
$$195$$

C
$$15$$

D
$$-15$$

Solution

Size of class $$= 195 - 180 = 15$$
Question 3
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Directions For Questions

The number of ducks at each pond in the Mumbai city is shown in the histogram.

...view full instructions

How many ponds had $$20-39$$ ducks?

A
$$25$$

B
$$30$$

C
$$20$$

D
$$15$$

Solution

From the histogram, the class width of number of ducks:
$$0 - 19 = 30$$ number of ponds.
$$20 - 39 = 20$$ number of ponds.
$$40 - 59 = 25$$ number of ponds.
$$60 - 79 = 10$$ number of ponds.
$$80 - 99 = 20$$ number of ponds.
$$100 - 119 = 15$$ number of ponds.

Therefore, $$20$$ ponds had $$20-39$$ number of ducks.

Hence, option $$C$$ is correct.
Question 4
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The annual maintenance cost of a machine in a factory over a seven years period is represented in the histogram.
In which year the maintenance is very low?

A
$$1995-1996$$

B
$$1996-1997$$

C
$$1997-1998$$

D
$$1998-1999$$

Solution

From the histogram, the maintenance cost in the year:
$$1995-1996$$ is Rs. $$2000$$
$$1996-1997$$ is Rs. $$3000$$
$$1997-1998$$ is Rs. $$1500$$
$$1998-1999$$ is Rs. $$2500$$
$$1999-2000$$ is Rs. $$4850$$
$$2000-2001$$ is Rs. $$5000$$
$$2001-2002$$ is Rs. $$7200$$.

Then clearly, the maintenance is very low in the year $$1997-1998$$.

Hence, option $$C$$ is correct.
Question 5
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Directions For Questions

The histogram represents the number of children entering into a library between different times in a day.

...view full instructions

In which hour interval, the children are $$55$$?

A
$$0-10$$

B
$$10-20$$

C
$$20-30$$

D
$$30-40$$

Solution

From the histogram,
The number of children entered during $$0-10$$ hours $$= 45$$
The number of children entered during $$10-20$$ hours $$= 55$$
The number of children entered during $$20-30$$ hours $$= 15$$
The number of children entered during $$30-40$$ hours $$= 25$$
The number of children entered during $$40-50$$ hours $$= 85$$
The number of children entered during $$50-60$$ hours $$= 10$$.

Therefore, $$55$$ children entered into the library between the interval $$10-20$$.

Hence, option $$B$$ is correct.
Question 6
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Find the class interval with lowest frequency.

A
$$318-335$$

B
$$354-371$$

C
$$372-389$$

D
$$426-443$$

Solution

In the given data, we observe the lowest frequency $$=1$$

So, the class interval for the lowest frequency $$1$$ is $$426-443.$$
Question 7
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Directions For Questions

Judah recorded the number of football tickets collected by his friends, on the histogram.

...view full instructions

Which is the lowest ticket collected by Judah?

A
$$5$$

B
$$11-13$$

C
$$14-16$$

D
$$10$$

Solution

The lowest height of the bar represents the lowest ticket collected by Judah i.e. $$5$$.
Hence, the answer is $$5$$.
Question 8
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Directions For Questions

Judah recorded the number of football tickets collected by his friends, on the histogram.

...view full instructions

Find the total number of tickets.

A
$$60$$

B
$$80$$

C
$$90$$

D
$$100$$

Solution

The total number of tickets $$= 25 + 15 + 10 + 5 + 20 + 25 = 100$$
Question 9
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Rahul made a frequency table of height for his students. In which class interval, the number of students is less?

A
$$5-10$$

B
$$10-15$$

C
$$15-20$$

D
$$35-40$$
Question 10
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Directions For Questions

Judah recorded the number of football tickets collected by his friends, on the histogram.

...view full instructions

How many tickets were collected in the interval $$11-13$$?

A
$$25$$

B
$$15$$

C
$$10$$

D
$$5$$

Solution

Since the height of the bar in the interval $$11-13$$ is $$5$$.
So, $$5$$ tickets were collected in the interval $$11-13$$.
Hence, option D is correct.