Write an array of values to a range of cells in a spreadsheet

Range.setValue() is used for setting the same value in every cell of the range, while setValues is used to set an array of values into the corresponding cells in the range. Be aware that this method expects a multi-dimensional array, with the outer array being rows and the inner array being columns. So in your case the data should look like:

var employees=[["Adam"],["Barb"],["Chris"]];