Statistics Quiz - Trivia MCQ questions & solution (original) (raw)

If the mean of a dataset is greater than the median, what is the shape of the distribution likely to be?

What is the formula for calculating the mean absolute deviation (MAD) of a dataset?

What is the interquartile range (IQR) of the dataset: [10, 15, 20, 25, 30]?

What is the coefficient of variation (CV) of the dataset: [15, 20, 18, 25, 22]?

What is the formula for calculating the skewness of a dataset?

What is the kurtosis of a normal distribution?

What is the formula for calculating the coefficient of determination (R²)?

• 1 - (Σ(y - ȳ)² / Σ(y - ŷ)²)
• 1 - (Σ(y - ŷ)² / Σ(y - ȳ)²)
• 1 - (Σ(ŷ - y)² / Σ(ȳ - y)²)
• 1 - (Σ(ȳ - y)² / Σ(ŷ - y)²)

What is the formula for calculating the covariance between two variables X and Y?

• Σ(X - x̄)(Y - ȳ) / (n - 1)
• Σ(X - μ)(Y - ν) / (n - 1)

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

What does the correlation coefficient (r) measure?

• The strength and direction of a linear relationship between two variables
• The difference between the means of two groups
• The spread of data points in a distribution
• The proportion of variance in the dependent variable explained by the independent variable

There are 42 questions to complete.

Take a part in the ongoing discussion