Statistics basic 001

Which of the following is a measure of central tendency?

• Standard deviation
• Median
• Range
• Variance

Which of the following is a measure of dispersion?

• Mean
• Median
• Standard deviation
• Mode

If the range of a data set is 12, what does it represent?

• The difference between the highest and lowest values
• The average of all the values
• The most frequently occurring value
• The spread of values around the mean

The interquartile range is a measure of:

• Central tendency
• Variability
• Skewness
• Normality

What does a standard deviation of zero indicate?

• The data set has a large spread
• All the values in the data set are the same
• The data set is normally distributed
• The data set has a positive skew

Which of the following measures of central tendency is influenced by extreme values?

• Mean
• Median
• Perfect negative relationship
• Range

A negatively skewed distribution has its tail pointing towards the:

• Left
• Right
• Center
• None of these

The correlation coefficient ranges between:

• -1 and 1
• 0 and 1
• -1 and 0
• 0 and infinity

A correlation coefficient of -0.8 indicates:

• A strong positive relat
• A weak negative relationshipionship
• No relationship
• Perfect negative relationship

The p-value in hypothesis testing represents:

• The probability of committing a Type I error
• The probability of committing a Type II error
• The level of significance
• The strength of the relationship