A company claims that a new product increases weight gain over a 3-month period by 5 pounds, compared to the existing product. Samples are taken with the following summary statistics: Summary statistics: Column n Mean Variance Std. Dev. Std. Err. Median Range Min Max Existing 10 5 0.6666667 0.816496 0.2581989 5 2 4 6 New 10 10.3 0.6222222 0.788810 0.2494438 11 2 10 12 Assuming normality, what is the approximate test statistic