A random sample of 7 students had the following scores on a quiz: 8 points; 9 points; 8 points; 6 points; 7 points; 6 points; 2 points. Which of the following is the best approximation of the mean absolute deviation of the sample of quiz scores?
1.90 points
2.13 points
1.63 points
2.30 points
Examine the following two data sets:
Set #1: 49, 55, 68, 72, 98
Set #2: 20, 36, 47, 68, 75, 82, 89
Which of the following statements is true?
They have the same mode.
They have the same median.
They have the same mean.
none of the above
Which of the following sets of numbers has a range of 51?
{29, 19, 72, 68, 39}
{81, 85, 37, 41, 60}
{17, 12, 9, 47, 82}
{62, 86, 44, 78, 95}
What is the mean of 36, 54, 66, 45, 36, 36, and 63?
36
45
48
63
The following are Raelee’s grades in math this semester: {93, 68, 83, 87, 79, 91}. If the teacher drops the lowest grade, which statement is true?
The median increases by 2.
The median increases by 5.
The mean increases by 2.
The mean increases by 5.
