A survey was conducted by a researcher to study the impact of per capita gross national product (GNP, measured in thousand dollars), female literacy rate (FemLit, number of literate females as a percentage of the total female population, expressed in percentage terms - e

A survey was conducted by a researcher to study the impact of per capita gross national product (GNP, measured in thousand dollars), female literacy rate (FemLit, number of literate females as a percentage of the total female population, expressed in percentage terms - e.g., 10% expressed as 10) on infant mortality rate (IMR, number of deaths per 1,000 live births of children under one year of age, expressed in logarithmic terms). Data across 150 countries were collected and the following regression was estimated: IMR = 14.83 - 1.01 FemLit -0.97GNP-0.64FemLitx GNP, R = 0.545. (1.23) (1.64) (1.08) (0.79) The standard errors are given in parentheses. The researcher wants to check if the effect of a unit increase in FemLit and GNP, above and beyond the sum of the effects of a unit increase in FemLit alone and a unit increase in GNP alone is significant or not. The t-statistic of the test the researcher wants to conduct keeping other variables constant will be (Round your answer to two decimal places. Enter a minus sign if your answer is negative.)