1.
Use NQP (and show your sketch) to assess normality or skewness of these data:
12, 13, 14, 14, 14, 15, 19, 24
- 2.
Assess the skewness or symmetry of the following data:
n = 498
s = 22.3
med = 5482.1
= 5479.0
- 3.
Give the symbol for
(a) population variance
(b) sample s.d.
- 4.
This question is the inverse of #3. Give the name (full name) for
(a) m
(b) s
2
- 5.
In the data set in #2, can you say that 68% of the observations lie between 5456.7 and 5501.3? Why or why not?
6.
Mr. Hansen’s stat final had the N(82, 10.5) distribution (i.e., m
= 82, s
= 10.5).
(a) What percentage of students scored between 61 and 103 on the exam?
(b) What rule did you use to answer part (a)?