A reporter bought hamburgers at randomly selected stores of two different restaurant chains, and had the number of Calories in each hamburger measured. Can the reporter conclude, at = 0.05, that the hamburgers from the two chains have a different number of Calories?
Chain A Chain B
Sample size 5 9
Sample mean 230 Cal 285 Cal
Sample standard deviation 23 Cal 29 Cal
a)No, because the test value -0.28 is inside the noncritical region
b)Yes, because the test value -0.28 is inside the noncritical region
c)Yes, because the test value -3.90 is outside the noncritical region
d)No, because the test value -1.26 is inside the noncritical region