Homework 1

• The relative frequency of a class is computed by  dividing the frequency of each class by the total sample size.
• The most important and commonly used graphical presenta!on of quantitative data is the histogram.
• The sum of relative frequencies found in a rela!ve frequency distribu!on for quantitative data necessarily equals  the number of elements in the given data 
• A common rule of thumb in construc!ng a relative frequency histogram is to use  when the data set consists of 100 values or more.
• The stem-and-leaf plot is used to display the distribu!on of small to medium-sized data sets.
• The median is the middle value when the data set is arranged in ascending (or descending) order.
• If there is an odd number of observations, then the median is simply the middle observation.
• If the manager of a grocery store wishes to display the sales trend, the most effective type of graph will be a line chart.
• Statistical inference is the process of making an es!mate, predic!on, or decision about a popula!on based on sample data. True.