Bobby Illig
7.22 Using the z table in Appendix B, calculate the following percentages for a z score of 2 0.08:
a. Above this z score
b. Below this z score
c. At least as extreme as this z score
a. Above this z score P (z > 0.08) = 0.5319
b. Below this z s
Robert Illig
3.18 Alumni giving rates for a number of universities, calculated as the number of alumni who donated
and the number who did not donate in a given year, represent which kind of variablenominal, ordinal,
or scale? What would be an appropriate
1.18 A researcher studies the average distance that 130 people living in U.S. urban areas walk each
week.
a. What is the size of the sample?
n=130
b. Identify the population.
People living in U.S. urban areas
c. Is this average a descriptive statistic or
1.18 A researcher studies the average distance that 130 people living in U.S. urban areas walk each
week.
a. What is the size of the sample?
n=130
b. Identify the population.
People living in U.S. urban areas
c. Is this average a descriptive statistic or
Robert Illig
5.28 Convert the following proportions to percentages:
a. 0.0173
0.0173 100=1.73
b. 0.8
0.8 100=80
c. 0.3719
0.3719 100=37.19
5.42 Random selection or random assignment: For each of the following hypothetical scenarios, state
whether selectio
9.12
9.16
Question 9.18
9.26
11.20
The mean of students in the front - mean of the student in the back = (82+ 79.5+ 71.5+ 72)/4 - (78+
77.41 +76+ 71.3)/4
11.22
Let the first group be 'Liberals'.
Second group is 'Conservative'
Using MINITAB software, the c
Bobby Illig
9.12
9.16
Question 9.18
9.26
11.20
The mean of students in the front - mean of the student in the back = (82+ 79.5+ 71.5+ 72)/4 - (78+
77.41 +76+ 71.3)/4
11.22
Let the first group be 'Liberals'.
Second group is 'Conservative'
Using MINITAB sof
Bobby Illig
12.20 For the following data, assuming a between-groups design, determine:
Group 1: 11, 17, 22, 15
Group 2: 21, 15, 16
Group 3: 7, 8, 3, 10, 6, 4
Group 4: 13, 6, 17, 27, 20
a. df between
D.F=k-1=4-1=3
b. df within
d.f=n-k-1=17-3-1=13
c. df tot
5.42 Random selection or random assignment: For
each of the following hypothetical scenarios, state
whether selection or assignment is being described. Is
the method of selection or assignment random? Explain
your answer.
a. A study of the services offere