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,Five students received the following test scores: 7, 11, 5, 6, and 11. Calculate the mode, media
a a a a a a a a a a a a a a a a
n, mean, and range of this distribution of scores. Which measure of central tendency would
a a a a a a a a a a a a a a
change the most if an additional test score of 2 were included in the distribution?
a a a a a a a a a a a a a a a
The table lists the scores of eight students on a test to measure anxiety, as well as the typical nu
a a a a a a a a a a a a a a a a a a a
mber of cigarettes each person smokes daily. Scores on the anxiety test can range anywhere
a a a a a a a a a a a a a a
from a low of 0 (indicating very low anxiety) to a high of 30 (indicating very high anxiety).
a a a a a a a a a a a a a a a a a a
Anxiety Cigarettes
Student Test Score Smoked Daily a a
1 8 11
2 9 3
3 15 11
4 14 16
5 21 26
6 12 10
7 22 24
8 17 18
Construct a scatterplot to represent the correlation between smoking and anxiety. Describ
a a a a a a a a a a a
e the direction of the correlation and give two possible explanations for it.
a a a a a a a a a a a a
At Michigan State University, 32 students are enrolled in class A, 48 students are enrolled in
a a a a a a a a a a a a a a a
class B, and 16 students are enrolled in class C. For which of these three classes is there t
a a a a a a a a a a a a a a a a a a a
he greatest probability that more than 75 percent of the students have blond hair?
a a a a a a a a a a a a a
Explain your answer and indicate why this explanation has relevance for ge a a a a a a a a a a a
neralizing appropriately from samples to the larger populations in which you are interest
a a a a a a a a a a a a
ed.
Page 1 a
,Answer Key
a
1.
2.
3.
Page 2
a
, 1. The average price for different brands of toothpaste could be visually displayed in
a a a a a a a a a a a a a
a(n)
correlation coefficient. a
scatterplot.
standard deviation. a
bar graph.
a
2. When you read a bar graph, it is most important for you to
a a a a a a a a a a a a
mentally transform the data into a normal curve.
a a a a a a a
identify the value of the standard deviation.
a a a a a a
note the range and size of the scale values.
a a a a a a a a
remember that correlation facilitates prediction.
a a a a
3. The most frequently occurring score in a distribution of scores is the
a a a a a a a a a a a
mode.
median.
standard deviation. a
mean.
4. In a group of five individuals, two report annual incomes of $10,000, and the othe
a a a a a a a a a a a a a a
r three report incomes of $14,000, $15,000, and $31,000, respectively. The mode
a a a a a a a a a a a a
of this group's distribution of annual incomes is
a a a a a a a
$10,000.
$15,000.
$16,000.
$31,000.
5. The mean of a distribution of scores is the
a a a a a a a a
most frequently occurring score.
a a a
arithmetic average of all the scores.
a a a a a
least frequently occurring score.
a a a
score exceeded by 50 percent of all the scores.
a a a a a a a a
6. Which measure of central tendency is used to calculate the average of your sc
a a a a a a a a a a a a a
hool grades? a
standard deviation a
median
mean
mode
Page 1 a
,Five students received the following test scores: 7, 11, 5, 6, and 11. Calculate the mode, media
a a a a a a a a a a a a a a a a
n, mean, and range of this distribution of scores. Which measure of central tendency would
a a a a a a a a a a a a a a
change the most if an additional test score of 2 were included in the distribution?
a a a a a a a a a a a a a a a
The table lists the scores of eight students on a test to measure anxiety, as well as the typical nu
a a a a a a a a a a a a a a a a a a a
mber of cigarettes each person smokes daily. Scores on the anxiety test can range anywhere
a a a a a a a a a a a a a a
from a low of 0 (indicating very low anxiety) to a high of 30 (indicating very high anxiety).
a a a a a a a a a a a a a a a a a a
Anxiety Cigarettes
Student Test Score Smoked Daily a a
1 8 11
2 9 3
3 15 11
4 14 16
5 21 26
6 12 10
7 22 24
8 17 18
Construct a scatterplot to represent the correlation between smoking and anxiety. Describ
a a a a a a a a a a a
e the direction of the correlation and give two possible explanations for it.
a a a a a a a a a a a a
At Michigan State University, 32 students are enrolled in class A, 48 students are enrolled in
a a a a a a a a a a a a a a a
class B, and 16 students are enrolled in class C. For which of these three classes is there t
a a a a a a a a a a a a a a a a a a a
he greatest probability that more than 75 percent of the students have blond hair?
a a a a a a a a a a a a a
Explain your answer and indicate why this explanation has relevance for ge a a a a a a a a a a a
neralizing appropriately from samples to the larger populations in which you are interest
a a a a a a a a a a a a
ed.
Page 1 a
,Answer Key
a
1.
2.
3.
Page 2
a
, 1. The average price for different brands of toothpaste could be visually displayed in
a a a a a a a a a a a a a
a(n)
correlation coefficient. a
scatterplot.
standard deviation. a
bar graph.
a
2. When you read a bar graph, it is most important for you to
a a a a a a a a a a a a
mentally transform the data into a normal curve.
a a a a a a a
identify the value of the standard deviation.
a a a a a a
note the range and size of the scale values.
a a a a a a a a
remember that correlation facilitates prediction.
a a a a
3. The most frequently occurring score in a distribution of scores is the
a a a a a a a a a a a
mode.
median.
standard deviation. a
mean.
4. In a group of five individuals, two report annual incomes of $10,000, and the othe
a a a a a a a a a a a a a a
r three report incomes of $14,000, $15,000, and $31,000, respectively. The mode
a a a a a a a a a a a a
of this group's distribution of annual incomes is
a a a a a a a
$10,000.
$15,000.
$16,000.
$31,000.
5. The mean of a distribution of scores is the
a a a a a a a a
most frequently occurring score.
a a a
arithmetic average of all the scores.
a a a a a
least frequently occurring score.
a a a
score exceeded by 50 percent of all the scores.
a a a a a a a a
6. Which measure of central tendency is used to calculate the average of your sc
a a a a a a a a a a a a a
hool grades? a
standard deviation a
median
mean
mode
Page 1 a
