Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample 144 grocery stores and find that the average cost is X-bar = 89 cents with a standard deviation s 11 cents. You want to...

Extracted text: Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample 144 grocery stores and find that the average cost is X-bar = 89 cents with a standard deviation s 11 cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the following hypotheses: Ho: µ < 75="" and="" ha:="" µ=""> 75. What is the computed test statistic? Calculate the z or t, whichever is appropriate, and give the result rounded to 2 decimal places. If it's a negative number, put the negative sign before the number with no spaces between it and the number. In this problem, do not convert the cents to decimal format.