What is the Z-score for the student with two siblings? In a statistics class, students were asked how many
siblings they have. Their responses are shown.
2, 3, 1, 3, 5, 3, 3, 3, 6, 3,5, 0,3

1. -0.67
2. -0.13
3. 0.13
4. 0.67

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What is the sum of the first 8 terms of the geometric series