Descriptive Statistics
Gives information that describes the data in a specific manner
o How widely dispersed is this data?
o Are there a lot of different values?
o Where does a particular data value stand with respect with the other
values in the data set
Homework week 5
Lane
1.4
Why is a 99% condence interval wider than a 95% condence interval?
More condence that an interval contains the true parameter, results in a wider interval. The 99%
interval must contain 99% of the possible values, which makes it w
Lane
1.8
Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a
mean of 71 mph and a standard deviation of 8 mph.
a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to
STAT 200 Quiz 1 Student Version
1.
The newspaper reports that higher rates of sunburn and ice cream
consumption correspond. Does that mean that eating ice cream can put
you at risk of sunburn? What might be the reason behind this
phenomenon?
a. Kids are n
Sample Outline for Case Study
Note: Each of these roman numerals and letters represent a segment of your paper, not a paragragh.
I.
Introduction: Overview of the type of substance abuse issue you are focusing upon, its impact
(on society and this agency)
Assignment 4
A Shift from Fossil Fuels
I believe its not the question of do we think we can find renewable energy sources to
replace fossil fuels, but rather its we have to find an alternative source for energy besides
nonrenewable fossil fuels. Fossil fu
Superfund and the National Priority List
A. What is a Superfund site? Superfund sites are sites for toxic waste that have been placed
on the National Priorities List. This allows for the EPA to clean up these specific sites and
to push responsible parties
The World We Live In
We live in a world filled with beauty but also devastation. The environment that surrounds us
has a lot to offer and has greatly helped to support us humans on this earth for many years, but have we
reciprocated the same amount of res
Week 8 Homework
1.15
a. main effect
b. simple effect
c. simple effect
d. interaction
e. specific comparison
2.17
Source of Variation
SS
df
MS
Outcome
924.8
1
924.8
Age
1805
1
1805
259.2
644.8
3633.8
1
16
19
259.2
40.3
Interaction
Error
Total
F
22.9478
9
4
1.18
You choose an alpha level of .01 and then analyze your data.
a. What is the probability that you will make a Type I error given that the null hypothesis is true?
0.01
b. What is the probability that you will make a Type I error given that the null hy
In order to increase the reliability of the conclusions drawn, we included only studies that are either
narrative reviews of the literature, meta-analytic reviews (which incorporate the data from many
individual studies into a single large-scale empirical
H0; Peach = Plum;
Plum
You would reject the Ho if it
than 2.819
And the t= 2.3530
Running a two sample t test for the data results in the following numbers
T= -3.759
p-value =0.0016
df= 16.36
Ho: u(prada) u(oracle) = 0
Ha: u(P)-u(O) is not zero
Which tr
Between-subjects design
A between subjects design is a way of avoiding the carryover effects that can
plague within subjects designs, and they are one of the most common experiment types
in some scientific disciplines, especially psychology.
The basic ide
Introduction
Define the functions of statistics
Define Descriptive Statistics and inferential statistics
Provide at least one example of the relationship between descriptive and inferential statistics
Conclusion and Putting the power point together and e
Lane et al.
3. If you are told only that you scored in the 80th percentile, do you know from that description
exactly how it was calculated? Explain
No, because percentiles can be calculated in three different ways. The first way is that 80 th percentile
Lane
1.7 (a).
Eye Color in Students
1
4
11
10
Brown
Blue
Green
Gray
(b).
Eye Color
Number of Students
0
Brown
2
Blue
4
6
Green
8
Gray
(c).
Eye Color
12
10
8
6
4
2
0
Number of Students
Brown
Blue
Green
Gray
10
12
(d).
Eye
Color
Brown
Blue
Green
Gray
Total
Lane
1.7
You ip a coin three times. (a) What is the probability of getting heads on only one of your ips? (b)
What is the probability of getting heads on at least one ip?
(a). 3/8 (b). 7/8
2.25
You are to participate in an exam for which you had no chance
Assignment 6
The World We Live In
We live in a world filled with beauty but also devastation. The environment that surrounds us
has a lot to offer and has greatly helped to support us humans on this earth for many years, but have we
reciprocated the same