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Ordinal and Interval Scales in Data Collection

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Ordinal and Interval Scales in Data Collection

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Questions and Answers

Which of the following is NOT a characteristic of a population?

Subset of the population (correct)

Set of all possible values of the variable

Numerical measures that describe the population of interest

Set of all entities under study

Which type of variable represents categorical data that does not have a numeric value?

Continuous variable

Qualitative variable (correct)

Discrete variable

Quantitative variable

If the probability of event A is 0.3 and the probability of event B is 0.5, what is the probability of the two events occurring together (A and B) assuming they are independent?

$0.3$

$0.8$

$0.5$

$0.15$ (correct)

Which of the following is NOT a type of statistical analysis?

Probability theory Signup and view all the answers

If two events A and B are not mutually exclusive, which of the following statements is true?

The probability of A or B is the sum of their individual probabilities Signup and view all the answers

Which of the following is a measure of central tendency that describes the typical or average value in a dataset?

Mode Signup and view all the answers

Which of the following is a property of a mutually exclusive event?

Events cannot occur at the same time Signup and view all the answers

What is the formula for the probability of the union of two non-mutually exclusive events A and B?

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$ Signup and view all the answers

What is the formula for the probability of the intersection of two independent events A and B?

$P(A \cap B) = P(A) \times P(B)$ Signup and view all the answers

Which of the following is a property of a random variable?

It is a function that associates real numbers with the elements of the sample space Signup and view all the answers

What is the sum of the probabilities of all possible values of a discrete random variable?

1 Signup and view all the answers

Which of the following is a property of the normal distribution?

It is unimodal and symmetric about the mean Signup and view all the answers

What is the formula for the standard score (z-score) of a normally distributed variable?

$z = \frac{value - mean}{standard\ deviation}$ Signup and view all the answers