Assignment-1 / Due 09/26
1.
Here are the IQ test scores of 10 randomly chosen fifth-grade students:
145
142
127
126
121
The median of these scores is ( 0.1)
132
123.5
96
111
119
118
.
Check Syntax
Regenerate
2.
A set of five integers contains 3, 8, and 18
Assignment #2
Figure 11.11 (below) is a Normal quantile plot of the heart rates of 200 male runners after a 6-minute treadmill run.
1. The distribution is close to Normal. How can you see this?
A. There is a positive relationship between the variables.
B.
Assignment 3
Scores on the Wechsler Adult Intelligence Scale are approximately Normally distributed with = 100 and = 15.
1. What scores x fall in the lowest 25% of the distribution?
A. x 75.00
B. x 89.95
C. x 110.05
D. x -110.05
E. x 85.36
F. x -85.36
Ans
Problem set 4
1. For each of the following state i) the null hypothesis, ii) the alternate hypothesis, and
iii) indicate whether the alternate hypothesis is one- or two-sided/tailed.
a) You wish to explore whether drinking coffee changes one's heart rate.
1
MIDTERM #1 FALL 2016 Dr. Joel S. Shore Solutions
1. For each of the following, i) name the variables measured and ii) state the type of
variables that have been explored in the experiment. Where more than one variable has
been studied, indicate which if
PROBLEM SET NOTES
Problem Set #1: SAS
3 Tabs on SAS:
1. Editor window: enter data set and necessary SAS statements to carry particular analysis
2. Log window: contains a listing of the analyses you have run along with any errors you might
have made; impor
Darwins Champions
Evolution appealed to non-scientists,
Darwin also managed to convince the
academic elite at Oxford and Cambridge.
What did Darwinism mean?
-A naturalistic methodology- a scientific
approach to life.
-The place of humans in nature, ou
STATISTICS MIDTERM #1
CHAPTER 1: Statistics & Samples
1.1 What is statistics?
Statistics: study of methods to describe and measure aspects of nature from samples.
Estimation: process of inferring an unknown quantity of a population using samples.
Param
BIOL 2060 vbelozerov@yorku.ca
Midterm 1 October 9 15%
Midterm 2 Nov 13 20%
Labs 18% 2% each 9 labs
Pop out quiz 10% 5 mins
Exam 30%
Individual project 7%
MUST DECLINE TWO WORDS: Population and Sample on what you learned their definitions are
Popn collecti
1
NAME
_
STUDENT #_
SC/BIOL 2060 3.0 STATISTICS FOR BIOLOGISTS
TEST #2
Nov 7, 2014
(TOTAL PAGES = 10 )
(TOTAL MARKS = 40)
(TIME = 90 MINS)
INSTRUCTIONS:
1) WRITE YOUR NAMES AND STUDENT NUMBER ON THE TEST
PAPER
2) PLEASE KEEP YOUR TEST PAPER TO YOURSELF!
3
1
NAME
_
STUDENT #_
SC/BIOL 2060 3.0 STATISTICS FOR BIOLOGISTS
TEST #1
Oct 10, 2014
(TOTAL PAGES = 7)
(TOTAL MARKS = 45 )
(TIME = 60 MINS)
INSTRUCTIONS:
1) WRITE YOUR NAME AND STUDENT NUMBER ON THE TEST
PAPER
2) PLEASE KEEP YOUR TEST PAPER TO YOURSELF!
3)
PROBLEM SET 3
1) With a few words and diagrams define the standard
deviation and standard error of the mean. What is the
purpose of using one versus the other?
2) For each of the following data sets estimate the mean and
the standard error of the mean (do
Problem set 8
1. You wish to know if hind limb length and forelimb length vary together in the 3-toed
sloth. Test this hypothesis using the data below.
x
y
hind fore
30 28
26 27
33 31
24 26
20 19
44 45
52 50
This is clearly a correlation question since th
You design two new kinds of light bulb (LED light and Compact Fluorescent) and then
conduct an experiment that assesses the growth of plants subjected to these light regimes.
Some plants received natural sun light (control), some receive LED light, and so
PROBLEM SET 3
1) With a few words and diagrams define the standard
deviation and standard error of the mean. What is the
purpose of using one versus the other?
The standard deviation is a descriptive statistic
estimating the amount of variation in a popul
Problem set 4
1. For each of the following state i) the null hypothesis, ii) the alternate hypothesis, and
iii) indicate whether the alternate hypothesis is one- or two-sided/tailed.
a) You wish to explore whether drinking coffee changes one's heart rate.
Problem set 5
For each of the following, conduct the most appropriate hypothesis test.
Where amenable, do this by "hand" and using SAS. Information on using SAS for goodness of fit tests is provided at
the bottom of the problem set as is the SAS informati
Problem set 8
1. You wish to know if hind limb length and forelimb length vary together in the 3-toed
sloth. Test this hypothesis using the data below.
x
y
hind fore
30 28
26 27
33 31
24 26
20 19
44 45
52 50
This is clearly a correlation question since th
Problem set 7
1. Answer all questions (5 through 8) on midterm test #2 using SAS.
2. You design two new kinds of light bulb (LED light and Compact Fluorescent) and then
conduct an experiment that assesses the growth of plants subjected to these light regi
1
1.Note that grades are given in red font.
2.For questions 4 through 8, if you didnt carry
out the statistical test correctly you did not
get any marks for your conclusions.
3.If you hand your test in, I will re-examine the
entire test so ensure that you
1
NAME
_
STUDENT #_
SC/BIOL 2060 3.0 STATISTICS FOR BIOLOGISTS
TEST #1
Oct 4, 2013
(TOTAL PAGES = 7)
(TOTAL MARKS = 42 )
(TIME = 60 MINS)
INSTRUCTIONS:
1) WRITE YOUR NAME AND STUDENT NUMBER ON THE TEST
PAPER
2) PLEASE KEEP YOUR TEST PAPER TO YOURSELF!
3)
1
NAME
_
STUDENT #_
SC/BIOL 2060 3.0 STATISTICS FOR BIOLOGISTS
TEST #1
(TOTAL PAGES = 8)
(TOTAL MARKS = 30)
(TIME = 60 MINS)
INSTRUCTIONS:
1) WRITE YOUR NAME AND STUDENT NUMBER ON THE TEST
PAPER AND SCANTRON (BUBBLE THEM IN! AS WELL)
2) PLEASE KEEP YOUR T
Problem set 6
(answer questions by hand, and where possible, also use SAS. Programming statements
for using SAS are given at the bottom of the problem set).
need to know these equations z = (x - )/ and z = (x - )/ x
1) Given a normally distributed populat
Summary statistics and plots for test2 (and some comparisons to test 1).
N
186
Sum Weights
186
Mean
65.2150538
Sum Observations
12130
Std Deviation
21.5412267
Variance
464.024448
Skewness
-0.4750369
Kurtosis
-0.3871289
Uncorrected SS
876903.125
Corrected
1
1) WRITE YOUR NAME AND STUDENT NUMBER ON THE TEST
PAPER
2) PLEASE KEEP YOUR TEST PAPER TO YOURSELF!
3) ANSWER ALL QUESTIONS DIRECTLY ON THE TEST PAPER
ITSELF IN THE SPACE PROVIDED.
4) READ QUESTIONS CAREFULLY, AND THINK CAREFULLY
BEFORE ANSWERING, PROVI
Terminology
Random Sample: When each member of a population has an equal and independent
chance of being selected.
Categorical Variable: qualitative characteristics of individuals that do not have
magnitude on a numerical scale
Nominal: if the different c
Z Table
the z-values represent the right tail in this table
PROBABILITY VALUES ASSOCIATED WITH Z IN NORMAL DISTRIBUTIONS
(Probability in one direction: reject null hypothesis if value is less than that set for test at the
derived Z value. Left-hand column
Problem set #1
1) Ensure that you are able to access the statistical program, SAS, at the university
"acadlabs". You will need to login using your PASSPORT YORK username and
password, so make sure you know what those are. If you have forgotten, I suppose
Problem set 4
1. For each of the following state i) the null hypothesis, ii) the alternate hypothesis, and
iii) indicate whether the alternate hypothesis is one- or two-sided/tailed.
a) You wish to explore whether drinking coffee changes one's heart rate.
PROBLEM SET 3
1) With a few words and diagrams define the standard
deviation and standard error of the mean. What is the
purpose of using one versus the other?
The standard deviation is a descriptive statistic
estimating the amount of variation in a popul