Half of Students in a Class Got 77% on a Test

question 38

Multiple Choice

Half of students in a class got 77% on a test while the remaining half got 83%. What is the standard deviation of the test scores for the class?

• A)2.45
• B)4.24
• C)3.00
• D)1.71

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Definitions:

Rebounds

In sports, the act of successfully retrieving the ball after a missed shot.

Geometric Sequence

A numerical series where each number after the first is determined by multiplying the prior number by an unchanging, non-zero numerical value, denoted as the common ratio.

Partial Sum

A partial sum is the sum of the first n terms of a sequence, often used in the context of series to understand the progression or to investigate convergence.

N Th

In mathematics, "n-th" refers to an unspecified member of a sequence, indicating its position with the variable n.