Homework #3
Statistics II
Ryan Sweeney and Munin Sahal
Sleep (hours)
1. It is generally recommended that adults sleep at
least 8 hours each night. Dr. Schultz asked her
students on the first day of cl
Homework #3
Statistics II
Ryan Sweeney and Munin Sahal
1. It is generally recommended that adults sleep at least 8 hours each night. Dr. Schultz
asked her students on the first day of class this semes
Homework #2
Statistics II
Ryan Sweeney and Munin Sahal
(Answers are red to better differentiate between the questions and answers)
1. Arsenic-based additives are included in the diets of about 70% of
Exploring the Gender Wage Gap
Ryan Sweeney
Statistics 2
Distributions Gender=Female
Salary
1. The advantage of using the narrowly defined
data set is that it accounts for the salaries of different
job
Homework #3
Statistics II
Ryan Sweeney
Distributions
Caffeine (mg)
1. Researchers at the University of
Florida investigated the level of
caffeine in 16-ounce cups of Starbucks
coffee. During one phase
Homework 13
Statistics 2
Ryan Sweeney
Cockroaches:
1.
Group
Trial
Adult Male
Adult Female
Pheromone
N=20
N=20
Control
N=10
N=10
It is not all balanced as the two factors are not equal.
Gravid
N=20
N=1
Homework 14
Statistics 2
Ryan Sweeney
1)
Handfoot
Bivariate Fit of Hand Span By Height
a) The scatterplot is fairly scattered,
implying a weak correlation between
hand span and height. It does appear
Exploring the Gender Wage Gap
Ryan Sweeney
Statistics 2
Distributions Gender=Female
Salary
1. The advantage of using the narrowly defined
data set is that it accounts for the salaries of
different job
Homework 6
Statistics 2
Ryan Sweeney
Distributions
Time
1. Test the Hypothesis that there is a
difference between the mean lifetimes
of generic and brand-name AA
batteries. Use a two-sample t test wit
Homework #3
Statistics II
Ryan Sweeney
Distributions
Caffeine (mg)
1. Researchers at the University of
Florida investigated the level of
caffeine in 16-ounce cups of
Starbucks coffee. During one
phase
EXCEL DATA ANALYSIS
DESCRIPTIVE STATISTICS
1. Click the data tabs Data Analysis command button to tell Excel you want to calculate descriptive
statistics.
2. In the Data Analysis dialogue box, highlig
Dataset 1:
Dataset 1 does not have a linear relationship, it is non-linear. It
has a correlation of some kind because it looks linear until
around x=12 where the tail starts going down noticeably.
Alt
Homework 6
Statistics 2
Ryan Sweeney
Distributions
Time
1. Test the Hypothesis that there is a
difference between the mean lifetimes
of generic and brand-name AA
batteries. Use a two-sample t test wit
Nico Rivera
Stats II HW3
Q1
-No obvious lurking variable
-SRS
-independent
14.37/12.36=1.16<2 pooled
H0: A - C =2 HA: A - C > 2
T=2.48 P-value =.007 Df= 61
So since p-value .007<.05 We Reject H0 and p
Nico Rivera
Lab01
STAT02-9:25
Variable 1
1)
The distribution is not normal shaped with roughly 7 outliers
showing on the plot indicating a skew to the left.
2)
Data is skewed left.
Data on y axis: The
Nico Rivera
Lab 9 STATS II UMA
a) Describe the relationship in terms of direction, form, strength, and indicate any
unusual points?
-Positive, linear, moderately strong and no unusual points.
b) Give
Nico Rivera
Stats II HW3
Q1
-No obvious lurking variable
-SRS
-independent
14.37/12.36=1.16<2 pooled
H0: A - C =2 HA: A - C > 2
T=2.48 P-value =.007 Df= 61
So since p-value .007<.05 We Reject H0 and p
Nico Rivera
HW 01-STAT02 Sept 10
Q1: Each of the following paragraphs calls for a statistical test about a population mean m.
State the null hypothesis H0 and the alternative hypothesis Ha in each cas
Homework 14
Statistics 2
Ryan Sweeney
1)
Handfoot
Bivariate Fit of Hand Span By Height
a) The scatterplot is fairly scattered,
implying a weak correlation between hand span
and height. It does appear