In a cumulative percent frequency distribution the last class will have a

# In a cumulative percent frequency distribution the

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20.In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to a.oneb.100c.the total number of elements in the data setAnswer: b 21.Data that provide labels or names for categories of like items are known as 22.A tabular method that can be used to summarize the data on two variables simultaneously is called 23.A graphical presentation of the relationship between two variables is 24.A histogram is said to be skewed to the left if it has a a.longer tail to the rightb.shorter tail to the rightc.shorter tail to the leftd. longer tail to the left Answer: d
Descriptive Statistics: Tabular and Graphical Presentations 5 25.When a histogram has a longer tail to the right, it is said to be 26.In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as Exhibit 2-1The numbers of hours worked (per week) by 400 statistics students are shown below.Number of hoursFrequency0 - 92010 - 198020 - 2920030 - 39100 27.Refer to Exhibit 2-1. The class width for this distribution 28.Refer to Exhibit 2-1. The number of students working 19 hours or less a.is 80b.is 100c.is 180d.is 300Answer: b 29.Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less 30. Refer to Exhibit 2-1. The percentage of students working 19 hours or less is
6Chapter Two 31.Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29 32.Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is a.100%b.75%c.50%d.25%Answer: a33.Refer to Exhibit 2-1. The cumulative frequency for the class of 20 - 29