Data Analysis
Practice Test
1.
How many milliliters are there in 1.0 microliter?
a.
1.0 x 10
-2
mL
b.
1.0 x 10
-4
mL
c.
1.0 x 10
-3
mL
d.
1.0 x 10
-1
mL
2.
Why are plus and minus signs ignored in calculating percent error?
a.
An experimental value smaller than the accepted value is not considered an error.
b.
The formula for percent error automatically cancels out the signs.
c.
Only the size of the error matters, not whether the values in error are larger or smaller than the accepted values.
d.
Accepted values for data do not include negative numbers.
3.
The representation of data on graph that resembles a pizza is a _________.
a.
line graph
b.
circle graph
c.
bar graph
d.
inverse
4.
A cube of metal is 1.42 centimeters on an edge. It has a mass of 16.3 grams. What is the density of this metal?
a.
6.14 g/cm
3
b.
5.69 g/cm
3
c.
4.68 g/cm
3
d.
4.30 g/cm
3
5.
A measure of the closeness of a series of measurements is their ___________ .
a.
precision
b.
error
c.
percent error
d.
accuracy
6.
How many kilograms of lead are present in 426 pounds of lead? Each kilogram contains 2.20 pounds.
a.
194 kg
b.
193.6 kg
c.
937 kg
d.
937.2 kg
7.
Below is a list of common prefixes used in the SI and metric systems. Included with each is an abbreviation and a definition. Which set contains an error?
a.
deci d 10
-1
b.
micro μ 10
-6
c.
centi c 10
-2
d.
mega m 10
6
8.
In the SI system of measurement, there are seven ________ units
a.
English
b.
base
c.
derived
d.
metric
9.
Which of the following numbers is equal to 2.70 x 10
-4
?
a.
270
b.
0.675
c.
0.00027
d.
27 x 10
-3
10.
What is the area in square millimeters of a rectangle that is 7.431 cm long and 23.33 mm wide?
a.
1734 mm
2
b.
17.34 mm
2
c.
1.734 mm
2
d.
173.4 mm
2
11.
Which of the following is not a significant figure?
a.
zeros to the right of a significant digit when a decimal point is present
b.
zeros to the left of the first significant digit
c.
a zero between two digits that have values of 1 through 9
d.
a value of 1 through 9
12.
Dimensional analysis is a method of problem-solving that focuses on ________ .
a.
units
b.
accuracy
c.
precision
d.
error
13.
Perform the indicated mathematical operations and report the answer to the proper number of significant figures. (21.55 x 4.12 ) / 42.42
a.
2.1
b.
2.093 0
c.
2.093
d.
2.09
14.
How many significant figures will there be when the density value is calculated from the following data? mass = 24.47g; volume =13.2 mL
a.
4
b.
3
c.
2
d.
5
15.
What is the temperature 51°C expressed in kelvins?
a.
324 K
b.
222 K
c.
324° K
d.
273.0 K
16.
How is the slope of a linear graph calculated?
a.
slope = (x
2
– x
1
) / 100
b.
slope = (x
2
– x
1
) / (y
2
– y
1
)
c.
slope = (y
2
– y
1
) / (x
2
– x
1
)
d.
slope = (y
2
– y
1
) x 100
