Question

Meth Barie’s ice cream shop wants to decide whether to introduce a new ice cream flavor. They randomly selected 15 customers at their downtown Denton location to rate this new flavor. The rating is on a scale of 1 to 5, with 1 being ‘not interested’ and 5 being ‘strongly interested’. Meth Barie’s will approve the new flavor if the true mean rating is over 4.0.

What is the Null hypothesis for testing whether the new ice cream should be approved?

If the survey shows that the average rating is 4.4 with a standard deviation of 1.6, what is the calculated value of the test statistic?

What is the rejection region for testing at the 0.05 level of significance?

Answer 1