NORTHAMPTON - An executive at the what is considered the world's largest investment company will speak April 19 at Smith College on "A Humanist Approach to Data Science." Boston native Rachel Schutt was hired in February by New-York based BlackRock to be managing director, along with Sherry Marcus, of its new data science center in California. The company is said to have more than $5.5 trillion in assets under management. Much like the large data bases that help research scientists analyze cancer diagnoses to find better treatments, there is a growing interest in the use of artificial intelligence to analyze large amounts of data for the investment community. Prior to joining BlackRock, Schutt was senior vice president of Data Science at News Corp.