26. The acidity or alkalinity of a solution is measured using pH. A pH less than 7 is acidic; a pH greater than 7 is alkaline. The following data below represent the pH in samples of bottled water and tap water. Tap Mean: Tap Median: 7.64 7.45 7.47 7.50 7.68 7.45 7.10 7.56 7.47 7.52 5.09 5.26 5.20 5.02 5.26 5.13 5.26 5.21 a) Use your calculator to determine the mean and median pH for each type of water. State answer to two decimal places. Bottled 5.15 5.28 Bottled Mean: Median: 7.69 7.47 5.23 5.24 b) Suppose that a pH of 7.10 in tap water was incorrectly recorded as 1.70. How does this affect the mean? the median?

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