Having hypothesized that longer days cause people to be happier, a researcher finds a correlation of .53 (p=.03) between number of daylight hours and scores on his General Happiness Survey over the course of a year. (a) Should the researcher retain or reject the null hypothesis? retain reject (b) This correlation shows... a positive linear relationship no linear relationship a negative linear relationship (c) This finding... does not support the research hypothesis supports the research hypothesis