In order to use the formula ox deviation of the sampling distribution of the sample mean, which of the following conditions must be bet? 1) n ≥ 30 2) The population's distribution is approximately normal. 3)The sample size is less than 10% of the population size. O 1 only 3 and either 1 or 2 O 3 only All three conditions must be met. 2 only In to calculate the standard

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