Math 10
Final
Exam Practice
CHAPTERS 1, 2, 12
Answers
1B,
2C,
3B,
4A,
5C,
6A,
7C,
8A,
9C,
10B,
11B,
12D,
13B,
14B,
15A,
16B,
17D,
18D,
19B,
20C,
21B
TABLE
95% CRITICAL VALUES OF THE SAMPLE CORRELATION COEFFICIENT
Degrees of Freedom:
n - 2
Critical Values:
(+
and
-)
1
0.997
2
0.950
3
0.878
4
0.811
5
0.754
6
0.707
7
0.666
8
0.632
9
0.602
10
0.576
Questions 1 – 3 refer to the following:
A study led by Duke University researchers reported that “Overweight adults who aren’t on a diet need only a small amount of exercise … to prevent further weight
gain.”
(
Wall St. Journal
, 1/13/04)
The study involved 120 overweight or mildly obese adults.
Both those who were in the exercise group and those in the non-exercise
group were told not to diet during the eight-month study.
For each individual, the weight gain/loss was recorded.
Of ultimate interest was the average weight gain/loss
in eight months for all overweight or mildly obese adults who exercise a small amount.
1.
The 120 overweight or mildly obese adults represent the: A.
Population
B.
Sample
C.
Statistic
D.
Parameter
2.
The average weight gain/loss in eight months for the 120 people represents the: A.
Population
B.
Sample
C.
Statistic
D.
Parameter
3.
The actual numerical values for the weight gain/loss for each person in the study represent the: A.
Variable B.
Data
C.
Statistic
D.
Parameter
4.
What type of data would answer the following question:
Which month were you born in? A.
Qualitative
B.
Quantitative Discrete
C.
Quantitative Continuous
5.
What type of data would answer the following question:
How much gas do you use per week? A.
Qualitative
B.
Quantitative Discrete
C.
Quantitative Continuous
Questions 6 – 7 refer to the following situation:
You are interested in the average amount of money a San Jose family of 5 spends on groceries each month.
You will survey 50 families of size 5.
6.
Which type of sampling technique does the following method represent?
Call 50 of your parents’ friends who have a family of size 5 and ask them. A.
Convenience
B.
Stratified
C.
Cluster
D.
Systematic
7.
Which type of sampling technique does the following method represent?
Randomly pick 2 grocery stores in San Jose from a list of all of the grocery stores.
Ask all shoppers with a family of size 5 at each of the 2 grocery stores the question.
A.
Convenience B. Systematic
C. Cluster
D.
Stratified
Questions 8 – 12 refer to the following situation:
Criminal laboratories must sometimes estimate a person’s height from the length of the thigh bone.
To test this practice, a random sample of eight (living) adult males is taken, and the length of the thigh bone is compared to the person’s height.
Of interest is whether there is a
correlation between thigh bone length and a person’s height.