Descriptiv Statistics

Descriptiv Statistics

By Jemma Harutyunyan

Multiple Choice

The number of pregnancies a woman has had is an example of a

• Continuous Variable

• Discrete Variable

• Nominal Variable

• Ordinal Variable

Multiple Select

Which measurement scale allows for meaningful ratio?

• Nominal

• Ordinal

• Interval

•  Ratio 

Multiple Choice

Which of the following is MOST affected by extreme values?

• Median

• Mode

• Mean

• nterquartile Range

Multiple Choice

What does the interquartile range represent?

• The entire range of the data set

• The central 50% of the data set

• The average value in the data set

• The most frequently occurring value in the data set 

Multiple Choice

What is the most common measure of spread?

• Range

• Interquartile Range

• Standard Deviation

• Variance

Multiple Choice

The square root of the variance is the

•  Coefficient of Variation

• Range

• Mean

• Standard Deviation

Multiple Choice

Which measure is useful for comparing the variability of datasets with different units?

• Range

• Standard Deviation

• Coefficient of Variation

• Variance

Multiple Choice

What measure is calculated as the 75th percentile - 25th percentile?

• Interquartile Range 

• Range

• Standard Deviation

• Coefficient of Variation

Multiple Choice

What does SMR stand for?

• Standard Mortality Ratio

• Standard Mortality Range

• Sample Mean Ratio

• System Medical Rate

Multiple Choice

In the direct method of standardization, we apply specific rates from which population to a standard population?

• The population of interest

• The standard population

• A random population

• All of the above 

Multiple Choice

In the indirect method of standardization, we apply specific rates from which population to a standard population?

• The population of interest

• The standard population

• A random population

• All of the above 

Multiple Choice

Which of the following is an example of a qualitative variable?

• Weight

• Gender

•  Age

• Height

Multiple Choice

What type of measurement scale assigns values with no real meaning or ordering?

• Nominal
  

• Ordinal

• Interval

• Ratio

Multiple Choice

In a normal distribution, approximately what percentage of observations lie within one standard deviation of the mean?

• 50%

• 68.3%

• 95.4%

• 99.7%

Multiple Choice

What is the main purpose of a frequency distribution table?

• To summarize data visually
  
  

• To compare data points across multiple variables

• To organize data into classes or categories
  
  

• To display relative frequencies only

Multiple Choice

Which of the following is a method used to display cumulative frequency data?

• Histogram

• Frequency polygon

• Bar chart

• Cumulative frequency polygon

Multiple Choice

Which measure of dispersion is calculated by subtracting the smallest value from the largest value?

• Standard deviation
  

• Variance

• Range

• Interquartile range

Multiple Choice

What is the primary purpose of the standard mortality ratio (SMR)

• To compare rates between two unrelated populations
  
  

• To predict future mortality rates

• To compare observed deaths to expected deaths in a population
  
  

• To calculate crude birth rates

Multiple Choice

What percentage of observations lie within three standard deviations of the mean in a normal distribution?

• 50%

• 68.3%

• 95.4%

• 99.7%

Multiple Choice

Height and weight are examples of what type of quantitative variable?

• Discrete

• Continuous

• Nominal

• Ordinal

Multiple Choice

Which of the following is NOT a type of descriptive statistic?

• (a) Mean

• (b) Median

• (c) Mode

• (d) P-value 

Multiple Choice

Descriptive statistics are primarily used to organize and summarize data.

• True

• False

Multiple Choice

A characteristic that can take on different values is called a

• Constant

• Parameter

• Variable

• Statistic