Use the following scenario to respond to questions 6 & 7: Ferulic acid is a compound that may play a role in disease resistance in corn. A botanist measured the concentration of soluble ferulic acid (nmol acid per gm tissue) in corn seedlings grown in the dark or in a light/dark photoperiod. The data are shown in the table below: Sample 1: Dark 92 117 88 91 107 109 100 101 87 87 Sample 2: Photoperiod 111 127 104 115 129 124 123 121 120 117 Use R to construct a 95% confidence interval for the difference in ferulic acid concentration under the tw conditions. Assume the two populations from which the data came are normally distributed. (Round you answer to 1 place after the decimal.) 95% confidence interval: (

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