A Political Scientist Wants to Prove That a Candidate Is

question 3

Multiple Choice

A political scientist wants to prove that a candidate is currently carrying more than 60% of the vote in the state.She has her assistants randomly sample 200 eligible voters in the state by telephone and only 90 declare that they support her candidate.The observed z value for this problem is _______.

• A)-4.33
• B)4.33
• C)0.45
• D)-.31
• E)2.33

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Definitions:

Expression

A combination of symbols and numbers that represent a mathematical operation or relation.

Difference

The result of subtracting one number from another, or the operation of subtraction itself.

Polynomials

Algebraic expressions that consist of variables and coefficients, combined using only addition, subtraction, multiplication, and non-negative integer exponents.

X

A commonly used variable or symbol to represent an unknown value in mathematics and algebra.