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Please answer the following question below A researcher is interested in whether infants' attention to their mothers' voices increases in the first week of life.

Please answer the following question below

A researcher is interested in whether infants' attention to their mothers' voices increases in the first week of life. Let's assume she tests four infants and finds the following values for infant attention (in seconds): 6, 6, 8, and 8 (thus, the average is 7). She wishes to use the standard deviation to estimate the population standard deviation. Use the correct formula to calculate the standard deviation for the sample

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