The American Community Survey (ACS), administered by the US Census Bureau, is given every year to a random sample of about 3.5 million households, about 3% of all US households. Data on a random sample of 1% of all US residents are made public after ensuring anonymity. In a randomly selected sub-sample of the ACS, the proportion of males who are married is 0.42 and the proportion of females who are married is 0.4. The standard error for the difference in sample proportions (male proportion minus female proportion) is 0.07. If you test whether the proportion of people who are married is different for males than for females, the standardized test statistic, also known as the 2- statistic, is ________ . Please round your answer to 2 decimal places