Jamie, a chef, claims that her meatball weight is more than3

ounces, on average. Several of her customers do not believe her, so she decides to do hypothesis test, at a5%

significance level, to persuade them. She cooks13

meatballs. The mean weight of the sample meatballs is3.6

ounces. Jamie knows from experience that the standard deviation for her meatball weight is0.5

ounces.

• H0:3;Ha:>3
• =0.05
• (significance level)

What is the test statistic (z

-score) of this one-mean hypothesis test, rounded to two decimal places?

Provide your answer below: