9 1 pt: A car company is testing to see if the proportion of all adults who prefer blue cars has changed (differs) from 0.35 since industry statistics indicate this proportion has been 0.3E for quite some time. A random sample of 1,000 car owners nds that the proportion that prefers blue cars is 0.40. What is our test statistic value (standardized score)? 0 0.40 O 0.05 O 3.33 0 +3.33