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QUESTION: 11

The table below shows the distribution of the number of people in each household in a village.

Determine which of the following inequalities is true for the number of people living in a house.

Mode < Median < Mean
Mode < Mean < Median
Median < Mean < Mode
Median < Mode < Mean

Answer(s): A

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QUESTION: 12

The stem and leaf chart below shows the ages of all the pensioners in a small village.

Identify which of the following is not true.

There are 13 pensioners in the village.
The most common age is 63.
The oldest pensioner is 89.
There is a pensioner aged 70.

Answer(s): C

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A biased coin has the following probability distribution function:
P(heads) = 0.80
P(tails) = 0.20
The biased coin is tossed twice in succession.
Calculate the probability of tossing at least one tail.

0.20
0.36
0.64
0.80

Answer(s): B

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QUESTION: 14

Define the standard deviation of a finite data set.

The standard deviation is the sum of the difference between each data point and its expected value.
The standard deviation is the product of the difference between each data point and its expected value.
The standard deviation is the square root of the product of the squared difference between each data point and its expected value.
The standard deviation is the square root of the average of the squared difference between each data point and its expected value.

Answer(s): D

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