The two-way frequency table shows data on years working with the company and college degree status for tom’s coworkers

Question and answers are in the attached picture. you so much in advance.

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2