Chapter 1012 Review
1. At a certain law school, firstyear scores average 65 and the SD is 12. The
correlation between LAST scores and firstyear scores is 0.55. The scatter
diagram is footballshaped. The deans office uses regression to predict firstyea
Chapter 1012 Review
1. The RMS error is

. About 68% of the data fall within 10
points of the regression line. Thus about 16% of the data is 10 points or
more above the line.
2. In a large class, the midterm average was 50 points with an SD of 22. The
f
Assignment 2 Solutions
Written Exercises: Review Exercises 2, 4, 7, 9, 10, and 11 on pp. 5055
2.
(a) There are more at age 1. The histogram is higher at 1 than at 71.
(b) There are more 21 yearolds.
(c) There are more people aged 04. The ranges being c
Assignment 3 Solutions
2. (a) List (ii) has the smaller SD. There are more values in the second list, but
because the additional values are equal to the mean, they contribute nothing to the
total squared deviation, so the two lists have the same total squ
Assignment 4 Solutions
Written Exercises: Review Exercises 1, 4, 6, 7 and 10 on pp. 9395
1. (a) 1.25 SDs corresponds to a zvalue of 1.25. For z= 1.25, the normal table
gives an area of 78.87. Thus the normal approximation says that about 78.87%
of the d
Math 117 Test 3 Review Solutions
This review consists only of counting problems from Chapter 9. The homework assignment due
Monday should provide adequate preparation for test material on Sections 8.3 and 8.4.
Justify your answer or show your work, but pr
Operations on Polynomials
I. Addition combine like terms (same variables and same exponents for these
variables) using the distributive property: ba + ca = (b+c)a
Examples: (1) 2 x 2 + 3x 2 = (2 + 3) x 2 = 5 x 2
(2) 4 xy + xy = 4 xy + 1xy = ( 4 + 1) xy =
Practice Sheet The Basics of Trigonometry
I. Convert the following degree measures to exact radian measures:
(1) 35 o =
(2) 150 o =
(3) 220 o =
(4) 405 o
II. Convert the following radian measures to degree measures:
(1)
2
=
3
5
=
9
(2)
(3)
7
=
18
(4)
8
=