1. Arturo’s Restaurant has a mean rating of 8.0 with a standard deviation of .8. Tony’s Restaurant: also has a mean rating by customers of 8.0, but with a standard deviation of 1.2.At which restaurant is the service likely to be more variable?
a. Arturo’s. The lower standard deviation indicates greater variability.
b. Tony's. The higher standard deviation indicates greater variability.
2.A student scored 148 on a recent exam that had a mean of 180 and standard deviation of 15. Which of the following is the most accurate interpretation?
a. This is not good, because the student was more than 2 standard deviations below the mean.
b.. This is good, because the student was more than 2 standard deviations below the mean.
c. This is good, because the student was more than 2 standard deviations above the mean.
d. This is not good, because the student was more than 2 standard deviations above the mean.
1 answer
2 is A