Suppose that the same sample dataset of July 1 temperatures consisted of 64 observations and that these 64 cases had a mean of 21°C with a standard deviation of four degrees. Using the same z = 2.33, what are the upper and lower bounds, rounded to three digits? 19.83 - 22.17 18.67 - 23.33 17.76 - 24.24 20.50 - 21.50 20.36 - 21.64

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