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Ninth Grade (Grade 9) Statistics and Probability Concepts Questions

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Grade 9 Line Plots CCSS: HSS-ID.A.1
Which of the following is most easily read from a dot plot?
  1. Mean
  2. Median
  3. Mode
  4. Standard Deviation
Grade 9 Range, Median, Mean, and Mode
In a set of numbers, the one that occurs the most is the
  1. range.
  2. unit price.
  3. mode.
Grade 9 Represent and Determine Probability CCSS: HSS-CP.A.1
A class has 11 boys and 9 girls. Two of the students will be selected at random to serve on a committee. What is the probability that both of the selected students will be girls?
  1. [math]72/400[/math]
  2. [math]18/95[/math]
  3. [math]81/380[/math]
  4. [math]81/121[/math]
Grade 9 Box Plots CCSS: HSS-ID.A.1
Which of the following box plots has a smaller IQR?
Box Plot 4
  1. A
  2. B
  3. They are the same.
  4. This cannot be determined with the information given.
Grade 9 Line Graphs
Line graphs
  1. show the relationship between 2 variables.
  2. show information collected by counting.
  3. show distribution of parts within a whole quantity.
  4. are visual displays of information or data.
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