Transcript Unit 4 EOCT Review

1. The accompanying diagram shows a boxand-whisker plot of student test scores on
last year’s Mathematics A midterm
examination.
Give the 5 number summary for this box plot
2. The data set 4, 5, 6, 7, 9, 9, 10, 10, 11, 14,
17, 17, 17, 19, 19 represents the number of
hours spent on the Internet in a week by
students in a mathematics class. Draw a box
plot for the data.
3. Find the mean, median, and mode for the
data set 2, 4, 5, 6, 7, 10, 10.
4. What is the interquartile range of the data
below?
20 21 23 27 28 29 30 31
5. Find the MAD for the following data.
5, 10, 20, 15, 15
6. Find the MAD for the following data.
4, 10, 7, 5, 3, 2, 1, 0, 8, 5
7. Write the data set that is represented by the
dot plot below.
8. The table shows the sizes, in square feet, of
a sample of eight houses from a
neighborhood. House 5 is a renovated
warehouse. What is the range of the sizes of
the house?
House
1
2
3
4
5
6
Size
1025
1288
2344
988
12985 1500
7
8
1077
2455
9. A reading teacher recorded the number of
pages read in an hour by each of her
students. The numbers are shown below.
44, 49, 39, 43, 50, 44, 45, 49, 51
Give the 5 number summary for this data set.
10. Use the table below to create a histogram
showing the frequencies for the ages of 50
persons attending a dolphin show at the zoo.
Interval
Frequency
0-10
8
10-20
9
20-30
6
30-40
5
40-50
10
50-60
12
11. What is the
frequency for
40-50?
A)The value of Q3 for the boys is
greater than the value of Q3 for
the girls.
B)The mean number of shoes for
the boys is greater than the
mean number of shoes for the
girls.
C)The value of Q3 for the boys is
less than the value of Q3 for the
girls.
D)The median number of shoes for
the boys is greater than the
median number of shoes for the
girls.
3. Given the scatter plot, what is the best type
of function to represent the data? Is there a
positive or negative correlation?
4. Isabella makes deposits to her savings account each month, and she also
earns interest. She records the amount of money in her savings account each
month, and finds that the equation y = 218x + 100 can be used to estimate
the dollars in her savings account for any month. Write a statement that is
true based on Isabella’s equation.
5. Sam tracks the growth of a plant, and records its height in centimeters each
week. He determines that the equation y = 2.3x + 16 can be used to
estimate the plant’s height for any week. Write a statement that is true based
on Sam’s equation.
6. Weak Negative Correlation
7. Strong Positive Correlation
8. No Correlation
9. What is the best-fitting linear line for the set
of ordered pairs?
(1, 4.2), (2, 3.8), (3, 3.5), (4, 2.7), (5, 2.2)
10. A pair of variables that would have a
negative correlation.
11. A pair of variables that would have a
positive correlation.
12. A data set has a correlation coefficient of
r = –0.916. What can you say about the
correlation coefficient?
13. The event s x and y have a correlation
coefficient of r = -0.08. What is the
relationship between x and y?
16. John creates a regression line for his data
and then plots the residuals. The residual plot
looks like a quadratic function. What does
this mean?
17. John creates a regression line for his data
and then plots the residuals. The residual plot
has no pattern. What does this mean?
A)The least squares regression line
is a good fit since there is a
definite pattern in the residual
plot.
B) The least squares regression line
is not a good fit as there is a
definite pattern in the residual
plot.
C)The least squares regression line
is a good fit as you have about
the same number of points
above and below the line.
D)The least squares regression line
is not a good fit since there is
about the same number of data
points above and below the line.