Eighth Grade (Grade 8) Statistics and Probability Concepts Questions for Tests and Worksheets

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Grade 8 Scatter Plots CCSS: 8.SP.A.1

This question is a part of a group with common instructions. View group »

Which situation best represents an outlier data point if it was plotted on the scatter plot?

The average temperature in March was $40 deg F$ . The family's heating bill that month was $140.
The average temperature in March was $50 deg F$ . The family's heating bill that month was $120.
The average temperature in March was $60 deg F$ . The family's heating bill that month was $180.
The average temperature in March was $70 deg F$ . The family's heating bill that month was $50.

Grade 8 Collecting and Interpreting Data

Jeremy's math grade went up this week but Sara's language arts grade went down. This is an example of

correlation.
causation.
unrelated events.
a and b.

Grade 8 Scatter Plots CCSS: 8.SP.A.1

Which scatter plot shows a positive trend?

Grade 8 Range, Median, Mean, and Mode

Of the following numbers: -10, -20, -20, 0, 10, 20, 20, the mode is -20.

True
False

Grade 8 Collecting and Interpreting Data

Correlation means

events are related.
one event causes another one.
the events are unrelated.
none of the above.

Grade 8 Combinations and Permutations

Evaluate.

$(8!)/(5!)$

Grade 8 Collecting and Interpreting Data CCSS: 8.SP.A.4

At Simmons school the following survey was done: 83 students are in honor roll and extracurricular activities, 79 students are in honor roll but not in extracurricular activities, 167 are not in honor roll but in extracurricular activities, and 54 are not in honor roll and not in extracurricular activities. Of the total number of students researched, what percent had made the honor roll?

42%
50%
67%
None of the above

Grade 8 Range, Median, Mean, and Mode

Faith times her first mile every time she goes running. Today she ran 4 miles, and her first mile was 6 minutes and 54 seconds. If her total time was 27 minutes and 12 seconds, what was her average mile pace on her last 3 miles?

7 minutes 12 seconds
7 minutes 8 seconds
6 minutes 8 seconds
6 minutes 46 seconds

Grade 8 Range, Median, Mean, and Mode

Find the mean of the following set of numbers:

$15w,12-w,14-4w,3-3w,11-7w$ .

$6w+8$
$15$
$8$
$w+3$

Grade 8 Collecting and Interpreting Data

A graph is a useful tool in displaying information or data.

True
False

Grade 8 Collecting and Interpreting Data

The amount of water that is given to a plant affects the rate at which it grows. This is an example of

correlation.
causation.
unrelated events.
a and b.

Grade 8 Scatter Plots CCSS: 8.SP.A.1

This question is a part of a group with common instructions. View group »

Does the scatter plot show a linear pattern or a nonlinear pattern?

linear pattern
nonlinear pattern

Grade 8 Scatter Plots

Typically, air temperature decreases through the night between midnight and 6:00 am. This is an example of what type of association?

constant association
positive linear association
negative linear association
no association

Grade 8 Collecting and Interpreting Data CCSS: 8.SP.A.4

150 students were surveyed and asked whether they played a sport and whether they played an instrument. The results are listed below: 60 play a sport and an instrument, 30 play a sport and not an instrument, 10 do not play a sport and play an instrument, and 50 do not play an instrument and do not play a sport. What fraction of students who play an instrument also do not play a sport?

$1//5$
$1//7$
$1//6$
$3//5$

Grade 8 Represent and Determine Probability

A girl is born, then a boy is born. This constitutes independent events.

True
False

Grade 8 Scatter Plots CCSS: 8.SP.A.1

Make a scatter plot to show the measurement of sales. Write POSITIVE, NEGATIVE, or NO CORRELATION.

${:(Cust omers, 47, 56, 35, 75, 25),(Sal es, 425, 501, 490, 350, 375):}$

Hint: Remember that measurement displays on the left of the graph
ANSWER: NO CORRELATION

Grade 8 Scatter Plots CCSS: 8.SP.A.1

This question is a part of a group with common instructions. View group »

Which statement best interprets the data shown on the scatter plot?

The family had lower monthly heating bills during months with high average temperatures.
The family had higher monthly heating bills during months with high average temperatures.
There is no relationship between the family's heating bill and the average monthly temperatures.

Grade 8 Scatter Plots CCSS: 8.SP.A.1

The graph of this data would most resemble a positive linear graph.
x: 8, 7, 6, 5, 4, 3, 2
y: 1, 2, 3, 4, 5, 6, 7

True
False

Grade 8 Combinations and Permutations

Evaluate.

$5!$

Grade 8 Represent and Determine Probability

There are 10 multiple choice questions each with three possible answers, only one of which is correct. A student guesses the answer to every question. The probability that the student will answer the first six questions correctly and the rest incorrectly is

$16/59049$ .

True
False

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Eighth Grade (Grade 8) Statistics and Probability Concepts Questions