How is a discrete variable defined in statistics?

• A) It can only take on values between 0 and 1.
• B) It can take any real number value.
• C) It can only take on negative values.
• D) It can only take a finite set of integers or whole numbers.

In statistics, which of the following best defines an observation?

• A) A hypothetical scenario
• B) A mathematical equation
• C) Any numerical recording of information
• D) A philosophical concept

How are observations grouped in a nominal scale?

• A) By arranging them in ascending order
• B) By measuring their magnitude
• C) By assigning them numerical values
• D) By categorizing them into mutually exclusive classes

How are variables classified according to the form of the characteristic of interest?

• A) By their shape
• B) By their size
• C) By their quantitative or qualitative nature
• D) By their colour

The ordinal scale is also known as .....

• A) Ratio Scale
• B) Nominal Scale
• C) Ranking Scale
• D) Interval Scale

The numbers carry no numerical significance in the __________ scale.

• A) ratio
• B) nominal
• C) ordinal
• D) interval

What does the mean represent in the context of ungrouped data?

• A) The lowest amount obtained on each day
• B) The highest amount obtained on each day
• C) The total amount obtained on each day
• D) The same amount obtained on each day

Suppose 10% of 2000 cars, 5% of 1500 trucks, and 15% of 800 motorcycles failed emissions tests. How would one most accurately find the overall percentage of vehicles that failed emissions tests?

• A) By dividing the sum of failure rates by the number of vehicle types
• B) By finding the weighted mean of the failure rates for cars, trucks, and motorcycles
• C) By adding the failure rates for cars, trucks, and motorcycles without averaging
• D) By averaging the failure rates for cars, trucks, and motorcycles

What does it mean if a dataset has no mode?

• A) The dataset is normally distributed
• B) There is only one value in the dataset
• C) The dataset contains outliers
• D) All values occur with equal frequency

The measure of central which is not affected by the extreme values is _________.

• A) weighted mean
• B) mode
• C) mean
• D) median

In a component bar chart representing the monthly expenses of a household such as rent, utilities, and groceries, what does each segment within a bar represent?

• A) The categories of expenses such as rent, utilities, and groceries
• B) The total expenses for the month
• C) The percentage of income spent on each category
• D) The comparison of expenses across different months

The median of the numbers 2, 4, 7, 12 is….

• A) 4
• B) 5.5
• C) 7
• D) 4.5

The mode of the data 6, 6, 9, 9, 9, 10, 11 11, 15, 18 is....

• A) 6
• B) 15
• C) 9
• D) 11

Qualitative data can be further classified in to discrete and continuous.

• A) True
• B) False
• C)
• D)

For constructing a bivariate frequency table, _____________ variable (s) is (are) required.

• A) only two
• B) only one
• C) may be one
• D) may or may not be two

In the _______ scale the ratio 10/7 has no meaning.

• A) interval
• B) nominal
• C) ordinal
• D) ratio

A bivariate distribution can be represented by using a ........

• A) Simple bar chart
• B) line graph
• C) component bar chart
• D) none of these

The heights (in inches) of a group of students are: 65, 72, 60, 68, 70, 62. What is the median height?

• A) 65.5
• B) 66.5
• C) 68.5
• D) 70.5

An absolute error divided by the true value is called the __________ error.

• A) ordinal
• B) relative
• C) mean
• D) true

How are the values of a continuous variable distributed within its domain?

• A) They are randomly distributed.
• B) They are concentrated around a central value.
• C) They are evenly distributed on the real line without gaps.
• D) They are distributed at specific, distinct points.