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Suppose a psychologist decides to use a matched pairs (paired) experiment to determine how long individuals can hold their hands in ice water when intoxicated compared to sober.

What type of statistical test should the psychologist do?

A

One-sample $T$-test.

B

Two-sample $T$-test.

C

One-proportion $z$-test.

D

Two-proportion $z$-test.

E

Chi-squared test.

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