Mathematics
Statistics
Easy

Question

Study the table and choose option the relative frequency of the text messages by students.

E mail
Text
Total
Parent
18
12
30
Student
18
102
120
Total
36
114
150

  1. 76%
  2. 68%
  3. 85%
  4. 80%

The correct answer is: 68%

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Games
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32
48
80
Female
50
30
80
Total
82
78
160

Study the table and choose the correct option

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Female
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The two-way frequency gives the preference of the size of screen of adults and students. Study the table and choose the correct option.

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The owner of horizon flight school created a scatter plot and calculated trend line for the data in table. The trend line equation is y = 1.44x + 877. Find the residuals for 6th year.
Year (x)
0
1
2
3
4
5
6
7
Students
832
872
905
928
903
887
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3
4
5
6
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3.5
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y
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