Grape, Inc’s uDevice X and uDevice X Plus’s daily sales for the year 2014 are reproduced in Appendix C. The monthly sales figures are as shown in table 1.
The descriptive statistics for the data in Appendix C is shown in table 2 as extracted from Grape, Inc.xls, Sheet uDevice X – uDevice X Plus D20
Test of Significance between uDevice X and uDevice X plus Sales
In order to test whether there is a statistically significant difference between uDevice X and uDevice X Plus, student t-test for two independent samples was used. It was assumed that the same have an equal variance and mean, since Grape, Inc. customers