Question 1

Identify the implied population in the information below. Government agencies carefully monitor water quality and its effect on wetlands (Reference: Environment Protection Agency Wetland Report EPA 832-R-93-005). Of particular concern is the concentration of nitrogen in water draining from fertilized lands. Too much nitrogen can kill fish and wildlife. Twenty-eight samples of water were taken at random from a lake. The nitrogen concentration (milligrams of nitrogen per liter of water) was determined for each sample. The variable in this information is nitrogen concentration (mg nitrogen/l water).

Accepted Answer

A)  number of fish
B)  samples of water taken at random
C)  none of these choices
D)  nitrogen concentration (mg nitrogen/l water)  in the entire lake D

Question 2

Use a random-number table to simulate the outcomes of tossing a quarter 20 times beginning at row 5, block 3. Assume that the quarter is balanced (i.e., fair) and an even digit is assigned to the outcome heads (H) and an odd digit to the outcome tails (T). $$\begin{array} { l l l l l l } 
65321 & 85623 & 10204 & 50218 & 20321 & 22315 \
98532 & 91972 & 39800 & 45670 & 20510 & 10451 \
92012 & 59826 & 35456 & 79289 & 91483 & 29754 \
45652 & 98653 & 45863 & 36963 & 15326 & 78952 \
45678 & 10100 & 91251 & 37041 & 13712 & 14672
\end{array}$$

Accepted Answer

A)  T T H T T T T H H T T T T H H T H H T H
B)  T T H T T T T H T T T T T T H T H H T H
C)  T T H T T T T H H T T T T T H T H T H H
D)  T T H T T T T H H T T T T T H T H T T H
E)  T T H T T T T H H T T T T T H T H H T H  E

Question 3

Use a random-number table to get a list of 10 random numbers between 1 and 99 beginning at row 2, block 2. $$\begin{array} { l l l l l l } 
65321 & 85623 & 10204 & 50218 & 20321 & 22315 \
98532 & 91972 & 39800 & 45670 & 20510 & 10451 \
92012 & 59826 & 35456 & 79289 & 91483 & 29754 \
45652 & 98653 & 45863 & 36963 & 15326 & 78952 \
45678 & 10100 & 91251 & 37041 & 13712 & 14672
\end{array}$$

Accepted Answer

A)  91 97 23 98 45 67 20 05 10 45
B)  91 97 23 98 45 67 02 05 10 10
C)  91 97 23 98 45 67 02 05 10 45
D)  91 97 32 98 45 67 02 05 10 45
E)  91 97 32 98 45 67 02 50 10 45  C

Question 4

Find the technique for gathering data in the study below. An ecology class used binoculars to watch 23 turtles at Lowell Pond. It was found that 18 were box turtles, and 5 were snapping turtles.

Accepted Answer

A)  experiment
B)  observational study
C)  sampling
D)  census
E)  none of these choices

Question 5

Find the technique for gathering data in the study below. A study of all league football scores attained through touchdowns and field goals was conduced by the National Football League to determine whether field goals account for more scoring events than touchdowns (USA Today).

Accepted Answer

A)  sampling
B)  census
C)  experiment
D)  simulation
E)  none of these choices

Question 6

Identify the variable in the information below. What is the average miles per gallon (mpg) for all new cars? Using Consumer Reports, a random sample of 35 new cars gave an average of 21.1 mpg.

Accepted Answer

A)  number of new cars surveyed
B)  cars
C)  miles
D)  miles per gallon
E)  gallons

Question 7

Data may be classified by one of the four levels of measurement. What is the name of the lowest level?

Accepted Answer

A)  interval
B)  nominal
C)  ordinal
D)  ratio
E)  simple

Question 8

Identify the sampling technique used in the following information. An important part of employee compensation is a benefits package that might include health insurance, life insurance, child care, vacation days, retirement plan, parental leave, bonuses, etc. Suppose you want to conduct a survey of benefits packages available in private businesses in Hawaii. You want a sample size of 100. Sampling technique used to get the sample size of 100 is described below.
Use the Island Business Directory. Number all the businesses. Select a starting place at random, and then use every 50th business listed until you have 100 businesses.

Accepted Answer

A)  Convenience sample
B)  Simple random sample
C)  Systematic sample
D)  Cluster sample
E)  Stratified sample

Question 9

Identify the level of measurement corresponding to the data "Gross income for each of the past 5 years" associated with robotics.

Accepted Answer

A)  interval
B)  ordinal
C)  ratio
D)  none of these choices
E)  nominal

Question 10

Identify whether the variable in the information below is qualitative or quantitative. The archeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland. Because of its archeological importance, Tara has received extensive study (Reference: Tara: An Archeological survey by Conor Newman, Royal Irish Academy, Dublin). Suppose an archeologist wants to estimate the density of ferromagnetic artifacts in the Tara region. For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined.

Accepted Answer

A)  quantitative
B)  qualitative
C)  neither qualitative nor quantitative
D)  qualitative as well as quantitative
E)  Information does not have any variable.

Exam 1: Getting Started

Find the technique for gathering data in the study below. An ecology class used binoculars to watch 23 turtles at Lowell Pond. It was found that 18 were box turtles, and 5 were snapping turtles.

Find the technique for gathering data in the study below. A study of all league football scores attained through touchdowns and field goals was conduced by the National Football League to determine whether field goals account for more scoring events than touchdowns (USA Today) .

Identify the variable in the information below. What is the average miles per gallon (mpg) for all new cars? Using Consumer Reports, a random sample of 35 new cars gave an average of 21.1 mpg.

Data may be classified by one of the four levels of measurement. What is the name of the lowest level?

Identify the level of measurement corresponding to the data "Gross income for each of the past 5 years" associated with robotics.