Question

Suppose that we had the following results from an experiment in which we measured the growth of a cell culture (as optical density) at different pH levels.

See table: pH level 4 5 5.5 6 6.5 7

Optical Density 0.15 0.22 0.26 0.31 0.35 0.41

(a) Find the equation that fits these data and

(b) Is there a positive correlation between pH levels and Optical Density? Test at the 5% level of significance

. Note: Just imagine that's a table. For (a), just write the equation Y = a + bX and for b, write similarly as questions 1 or 2 in the long questions. *

Answer 1