Suppose that two additional workers will be chosen to participate in the simulated escape exercise. denote their escape times by x27 and x28, and let xnew denote the average of these two values. modify the formula for a pi for a single x value to obtain a pi for xnew, and calculate a 95% two-sided interval based on the given escape data.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)