Your manager is interested in knowing whether nor not spending more money on digital advertising will lead to increased sales. Assist your manager by identifying a null and alternative statement based on this scenario. (No additional data was given)

Solved:

1. Ho:-mean(after) >mean before

mean(after) is the mean sales after the advent of digital advertising.

mean(before) is the mean sales before digital advertising.

Ha:-mean(before) >mean(after)

If the mean after the advertisement is more than the mean before the digital advertising there is enough evidence to support the null hypothesis. We can then agree that spending more money in digital advertising led to an increase in sales, and if the mean afterward decreases than before then we can conclude that more money doesnt really lead to an increase in sales.

Question:

Based on the solution given, what does the level of significance tell you?