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The reaction times for a random sample of 9 subjects to a stimulant were recorded as shown below 4.3 Calculate 2.3 2.7 38 2.1

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The reaction times for a random sample of 9 subjects to a stimulant were recorded as shown below 4.3 Calculate 2.3 2.7 38 2.1 2.8 2.2 3.1 3.7 (a) the range, (b) the variance using the formula of form s = 1 n-1 (* - *) * =1 (a) R= 2.2 (Type an integer or a decimal. Do not round.) (b) s = (Round to two decimal places as needed.) B

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