Math 20340: Statistics for Life Sciences
Fall 2009
Mid-semester Exam 1, practice questions
Solutions
1. I roll a dice and look at the number that comes up (so there are six simple events, namely
1, 2, 3, 4, 5 and 6, and each occurs with probability 1/6).
Math 20340: Statistics for Life Sciences Fall 2008 Mid-semester Exam 1 Solutions 1. I roll a dice and look at the number that comes up (so there are six simple events, namely 1, 2, 3, 4, 5 and 6, and each occurs with probability 1/6). I am interested in t
Math 20340: Statistics for Life Sciences Fall 2008 Mid-semester Exam 2 Solutions 1. Answer these questions using the standard normal table included at the end of this exam. In the rst two parts, z is a standard normal. 1. Find a z0 such that P (z > z0 ) =
Math 20340: Statistics for Life Sciences Fall 2008 Mid-semester Exam 3 Solutions 1. Achievement test scores of all high school seniors in a certain state have mean 60. A random sample of 100 students from one large high school had a mean score of 58, with
10.49
For this exercise, s2 z .3214 and n =15.
H12)
9 6.57063 23r6846
12
A 90% condence interval for 0'2 will be
(II-21).?2 < 02 < (n;l)s2
Xxx/2 ZUa/Z)
where xii/2 represents the value of 12 such that 5% of the area under the curve (shown in the g
Exam 1 Solutions.
3
1
1. We use the equation (f 1 ) (a) = f (f 1 (a) . Note that f (x) = 3x2 ex + 3. We also need to compute
f 1 (2). Since we cant easily solve y = f (x) for x, we try to guess a value of x so that f (x) = 2;
after a little trial-and-erro
Statistics for the Life Sciences
Math 20340 Section 01, Fall 2008 Homework 3 Solutions
4.75: Given: P (L) = .3, P (R) = .7 P (S|R) = .8, P (B|R) = .2 P (S|L) = .1, P (B|L) = .9 From this we get P (S R) = P (R)P (S|R) = .7 .8 = .56 P (S L) = P (L)P (S|L)
Statistics for the Life Sciences
Math 20340 Section 01, Fall 2008 Homework 2 Solutions
4.37: The experiment here is to pick one of the possible ways in which the board votes 5-3 in favour. To construct a simple event, we need just selected the ve people
Math 20340 Statistics for Life Sciences
Fall 2009 third midterm exam
November 23, 2009
SoLUTIOIJS
Name: Instructor: David Calvin
This examination contains 6 problems on 7 pages (including the front cover). The
exam also comes with a standard normal distri
Math 20340: Statistics for Life Sciences
Fall 2009 Mid-semester Exam 3 Solutions to practice problems
1. Achievement test scores of all high school seniors in a certain state have mean 60. A random sample
of 100 students from one large high school had a m
Statistics for the Life Sciences
Math 20340 Section 01, Fall 2009
Homework 2 Solutions
4.37:
The experiment here is to pick one of the possible ways in which the board votes 5-3 in
favour. To construct a simple event, we need just selected the ve people