Solutions
Continuous Distributions (4 questions)
1. A World Health Organization study of health in various countries reported that in Canada, the systolic
blood pressure readings (i.e. this is the top number of your blood pressure e.g. the 120 if your bp
Solution
Activity 1 Solution
Problem 1 (BY HAND type in your work):
Consider the following three sets of sample observations:
Set 1: 8, 9, 10, 11, 12
Set 2: 8, 9, 10, 11, 100
Set 3: 8, 9, 10, 11, 1000
A) Find the median and IQR for each data set.
Median
S
Solutions
Sampling Distributions (4 questions)
1. Using a college cost estimator, the average of campus rental at Penn State is approximately $547 per
month. Suppose these rates are roughly normal with a standard deviation of $100. Say you take a
random s
From lab 1:
A picture of all the
sample averages
calculated for the
average word length
of the Gettysburg
address:
Actual average word length:
4.3
Did we have biased samples? How
so?
How could we get a true random
sample?
STATISTICS 200:
EXPERIMENTS
AND
LAB ACTIVITY 20 (More on proportions)
Activity 1:
A Gallup poll asked the question, In general, do you feel that the laws covering the sale of firearms should be made: more strict, less strict, or kept as they are now? Of the n = 493 men who
responded, 67
LAB ACTIVITY 12 (Continuous Random Variables: Sections 8.5, 8.6)
To find probabilities for a normal random variable in Minitab, use:
Calc probability distributions normal
To find P(X is less than or equal to a), choose cumulative probability, fill in the
LAB ACTIVITY 23 (Review)
Activity 1:
The High School and Beyond data is from a large-scale longitudinal study conducted by the National
Opinion Research Center (1980) under contract with the National Center for Education Statistics. Below
is a table repre
LAB ACTIVITY 19
(Confidence Intervals for the Population Mean of Paired Differences AND
Confidence Intervals for the Difference in Two Population Means (Independent Samples)
To understand the context for todays lab, observe the following.
We first conside
LAB ACTIVITY 16 (Hypothesis tests One proportion)
Quiz will be on activity 1
P-value Guidelines when using Standard Normal Table (i.e. the Z-table):
Keep this in mind: The method for finding the p-value is based on the alternative hypothesis.
Minitab will
ESL015 Section 003
Self-study Homework
Due Saturday April 9th 11:59 pm
Type in your answers and then upload it to Angel drop box:
Homework, peer review, reading assignments > Self-study homework drop
box
Name your file as Self-study homework _First Name.
This corresponds to lectures 15 to 23 on Angel.
Sampling distributions (chapter 9)
population parameter = population mean = u
population standard deviation = o
sample mean= the mean of this sample, also one example of a sample
statistic= _ X.(random varia
mum g .88th uﬁ B om RE»? mg mm anon
w a “6m 3% 5:3 ow ﬁgs? 59m mﬁﬁ Em
2E .Eoewﬁ an E. ESE “85 555559“
Eu:on 2: 3 ﬁg 2: E E mEE
A? .5 am 5:05 Ea 25m ﬁﬂamwlﬁoe m5
.é xv 5 mm a 5% 58:93 uﬁ E 853?,
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35 FE bﬁﬁ E ~me 88:83 RE F
From lab 2:
Comparing pulse rates between the sitting
group and the 10 seconds of exercise group:
The average pulse rate of the sitting group was 75.2
and that of the exercise group was 85.8 .
Is this enough evidence to say 10 seconds of exercise
increase
LAB ACTIVITY 4 (Correlation: chapter 3)
Activity 1
Facts about correlation. Answer the following questions about correlation (r).
a)
What is the largest value the correlation can ever be in absolute magnitude (i.e. ignoring
the sign)? 1.0
b) If there is n
Hypothesis Testing Comparing Two Groups
1 For each of the following research questions does the situation or research question involve
independent samples or paired data?
a. Twenty-five people have their cholesterol measure before eating a Big Mac and aga
Probability Distributions-Discrete
No Data Set Needed
1 In each part, indicate, (1) whether the variable is discrete or continuous AND (2) whether it is
binomial or not AND (3) if it is binomial, give values for n and p.
a. Number of times a head is flipp
Comparing Two Categorical Variables
Data Sets Needed: Class Survey and HSB data sets
1: Sleep apnea is a pattern of irregular breathing during sleep, with longer than normal breath-holding
intervals. The following two-way table shows counts of men and wom
Probability
No Data Set Needed
1.1 Situation: The High School and Beyond data is from a large-scale longitudinal study
conducted by the National Opinion Research Center (1980) under contract with the
National Center for Education Statistics. Below is a ta
Analysis of Variance (ANOVA)
One-way analysis of variance is a method for comparing several population means, when the
data are from independent samples. It can be thought of as a tool for examining the relationship
between a quantitative response variabl
Sampling
No data sets used for this activity
Non-response bias refers to a bias that occurs if people with a particular opinion or trait tend to refuse
to answer certain survey questions (or possibly refuse to participate in the survey at all).
Response b
Sampling Distributions
No Data Set Needed
1 Suppose that medical researchers want to estimate the true proportion of all teenagers with
high blood pressure whose blood pressure would decrease if they took calcium supplements.
To test this, they plan a cli
Confidence Intervals Proportion and One Mean
1 The term sampling frame refers to the group that actually had a chance to get into the sample. Ideally,
this is the same as the population of interest, but sometimes it isnt. In the following situation, descr
Displaying Data
Data Set used for this activity: Class Survey
1 Suppose a medical researcher compares the average blood pressures of women
who take oral contraceptives to the blood pressures of women who do not.
a. Is blood pressure a categorical variable
Hypothesis Testing Proportion and One Mean
Data Set Needed: Class Survey
NOTE: for those using SPSS you will need to do hand calculations in parts 1 and 2.
P-value Guidelines when using Standard Normal Table (i.e. the Z-table):
Keep this in mind: The meth
LAB ACTIVITY 2
(Use Class Survey Dataset in Angel)
Activity 1: Other Graphical Summaries for Quantitative Data (Stem-andleaf plot, Dot plot, Box plot)
a. Create a Dot plot of Height (By Sex).
Use Graph -> Dotplot -> With Groups -> OK
Select Height for the