Draw the digitalsignals for the bit string 0101 0100 1100 111 using nrz-i andrz
encoding schemes. a 0is represented by a high value and a 1 is represented by alow
value.

An environmental protection agency study of 12 automobiles revealed a correlation of 0.47 between engine size and emissions. at 0.01 significance level, can we conclude that there is a positive association between the variables? what is the p value? interpret.