A researcher wants to know whether a coin used to decide the order of play during a basketball game is weighted toward heads (one-tailed test). He tosses the coin 20 times. If the critical value is 15, and he flips the coin and gets 18 heads, he would______________. (hint: Critical value is a point on the test distribution that is compared to the obtained statistic to determine whether to reject the null hypothesis.)     retain the null hypothesis, suggesting that the coin is NOT biased towards heads.     reject the null hypothesis, suggesting that the coin is biased towards heads.

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