Starbucks wants to decide whether to introduce their evenings program which features a thoughtful selection of wine and craft beer alongside the signature coffee and tea beverages at some location. they randomly selected 30 customers at the location to rate their evenings program. the rating is on a scale of 1 to 5, with 1 being ‘not interested’ and 5 being ‘strongly interested’. the result of the survey shows that the average rating is 4.0 with a standard deviation of 1.5. starbucks will approve the evenings program at the location if the true mean rating is over 3.5.
what is the null hypothesis for testing whether the new ice cream taste should be mass produced?