AnswersPA-Chemistry CRScientific Notation and Significant Figures

Using Math to Analyze Data Answers

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1
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Which graph is used to show change in a given variable when a second variable is changed?

A
bar graph
B
line graph
C
histogram
D
scatterplot
2
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Which property of a measurement is best estimated from the percent error?

A
accuracy
B
median
C
precision
D
range
3

Precision can be defined as the

A
exact center of a data set.
B
reproducibility of a measured value.
C
correlation between two variables that are measured in a data set.
D
agreement between a measured value and an accepted value.
4

A tree farm sells trees based on height in increments of 10 feet. Which graph would best show the current stock of trees?

A
bar graph
B
line graph
C
histogram
D
scatterplot
5

Which quantity is used to generate the error bars on a graph?

A
range
B
median
C
linear correlation
D
standard deviation
6

How can one determine the median of a data set?

A
by ordering the data points and finding the middle value of the set
B
by ordering the data points and finding the most common value in the set
C
by finding the average of the different values in the set
D
by finding the difference between the highest and lowest values of the set
7

Error bars on four different data points are shown below.Which of these data points is the most reliable?

Question illustration
A
point 1
B
point 2
C
point 3
D
point 4
8

In an experiment, Theresa measured 15.05 mL of water. She must have used a

A
flask that had markings every 25 mL.
B
beaker that had markings every 20 mL.
C
buret that had markings every 0.1 mL.
D
graduated cylinder that had markings every 1 mL.
9

Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data?

A
bar graph
B
line graph
C
histogram
D
scatterplot
10

Which of the following best specifies the purpose of error bars on a graph?

A
to show the mean of a data set
B
to identify the independent variable
C
to give a visual display of measurement precision
D
to indicate the total number of measurements that are made

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