Week 7_Statistics (IUP)

What is the preferred measure of central tendency for nominal data?

• Mode

• Median

• Mean

• Range

How is the median calculated for an even number of observations?

• It is the highest value in the data set.

• It is the middle value of the sorted data.

• It is the lowest value in the data set.

• It is the average of the two middle values.

What does the mode represent in a frequency distribution?

• The middle score when arranged in order

• The most frequently occurring score

• The range of the scores

• The average of all scores

Which of the following is NOT a measure of dispersion?

• Variance

• Standard Deviation

• Range

• Mean

What is the formula for calculating the range of a data set?

• Mode of the data

• Sum of all values / Number of values

• Max - Min

• Median of the data

What does the mean absolute deviation (MAD) measure?

• The average of the absolute deviations from the mean

• The average of the squared deviations from the mean

• The average of all data points

• The difference between the highest and lowest values

In a grouped frequency distribution, how is the median determined?

• By calculating the mode of the data

• By averaging the highest and lowest values

• By using the mean of the data

• By finding the middle class using cumulative frequency

What is the z-score used for?

• To determine the mode of a data set

• To calculate the median of a data set

• To measure the relative position of a data point

• To find the average of a data set

Which of the following describes the term 'percentiles'?

• Values that divide the data into 100 equal parts

• The difference between the highest and lowest values

• The average of the data set

• The most frequently occurring value

What is the primary purpose of calculating variance?

• To find the average of the data

• To measure the spread of the data around the mean

• To identify the mode of the data

• To determine the median of the data