Interpreting the Confidence Interval
Will Valdez
ITT Technical Institute
Interpreting the Confidence Interval
A simple random sample of 40 salaries of NCAA football coaches has a mean of
$415,953 and
Inferences from Two Proportions and Samples
Will Valdez
ITT Technical Institute
Inferences from Two Proportions and Samples
Task 1: Solve the following problems: A student of the author surveyed her
f
Green M&Ms and Diamond Pricing
Will Valdez
ITT Technical Institute
Task 1: Read the following case study, titled Green M&Ms:
Green M&Ms: Consider a class of 20 statistics students, where each student
Oscar Madriz
MA 3110
Exercise 2-2
TV Networks
10
9
8
7
6
CBS
FOX
ABC
5
4
3
2
1
0
TV Networks
25%
45%
30%
CBS
FOX
ABC
Each chart is an appropriate choice. I would decide on how it needs to be presented
The amount of money spent on various items in a persons monthly budget
I believe that pie chart would make a great visual representation for displaying
ones monthly budget. The total allowed to spend
MA3110: Module 2 Probability and Normal Distribution
Andrew Lewis 08/14/16
CBS
ABC
9
Fox
5
6
Number of Occurances
Fox
ABC
CBS
0
1
2
3
4
5
6
7
Percentage of Occurances
Fox ; 30%
CBS ; 45%
ABC; 25%
CBS
Task 1
The Graph I believe that better represents the data is the bar graph.
I say this because there isnt really a reason to use a pie chart, its not part of a whole (that I know of). Its
just data.
MA3110: Statistics
Module 2 Exercise 2.1
Terry Hashley
3/24/2016
Determine whether or not the data represent a probability distribution:
If the data represent a probability distribution, find its mean
MA3110: Statistics
Module 1 Exercise
Terry Hashley
3/15/2016
Task 1: Exercise 1.1
Question 1.1
Define the following terms:
Population
o The group of objects (whether it be people, items or otherwise)
Terry Hashley
MA3110: Statistics
4/3/2016
Module 3 Exercise 1
A simple random sample of 40 salaries of NCAA football coaches has a mean of $415,953 and a standard
deviation of $463,364. Construct a 95
Problem 1
Difference
Wins
163
0.599
55
0.537
-5
0.531
88
0.481
51
0.494
16
0.506
-214
0.383
I have to make images of the
plots so you can see them in
the homework for some reason.
That's why it's an i
MA3110: Statistics
Module 2 Exercise 2.2
Task 1
CBS
Fox
ABC
Total
9
6
5
20
Terry Hashley
3/24/2016
I feel the pie chart is the most representative of the
data as it gives an overall representation of
Task 1 - Part 1: 1. The sample size is not independent as the same population is being
sampled. 2. We need to use normally distributed populations with simple random samples
which is not what is used
Task 1
A
1
3
5
3
2
4
Source
Treatment
Error
Total
B
0
6
2
5
2
3
2.449
6
df
2
9
11
C
3
12
6
3
By hand
.05 Level of Significance
4
Sample Mean
6
Mean
4.243
Standard Deviation
18
Variance
110 Total Sum o
Party
F
R
R
F
U
D
DR
R
D
DR
R
R
DR
R
D
DR
R
D
D
D
R
D
R
R
W
D
D
W
R
R
D
R
R
W
R
D
W
D
R
D
R
D
What is the population under consideration? The first 44 US presidents
What are the two variables under co
The requirements for using this method :
1. The samples should be 2 simple random samples
2. The number of successes and the number of failures should be at least 5 for all parts.
1. The claim is that
Someone wants to estimate the mean age for college students. A random sample of 49 students indicates that the mean a
Since the population standard deviation is known, you can use the z score.
First,
Statistics 3110
Exercise 1
A simple random sample of 40 salaries of NCAA football coaches has a mean of $415,953 and a standard
deviation of $463,364. Construct a 95% confidence interval estimate of t
Assignment 1 - 12.14.14
MA3110 Statistics
Central Tendency and Measures of Variation
TASK 1:
1.1 Define:
1.
Population - the specified extent or degree to which an area is or has been populated
[SOURC
PLEASE NOTE:
There are 50 examples here.
The final chooses 28 of them. They will not be numbered the same.
I only numbered them so you can see where one problem begins and
ends.
1.How many ways can yo
1. Finding the probability of the standard normal is LESS than a number z
P(z < 1.23) 0.890651
formulas->morefunctions=>statistical
normsdist
This function always gives the amount that is B
Finding th
Baseball Team Wins and the Results of the Difference
Using excel feature to find r
Diference Wins
X
Y
163
0.599
55
0.537
-5
0.531
88
0.481
51
0.494
16
0.506
-214
0.383
r=
formulas, more, statistical,
The following table contains data of region of birth and political party of the first 44 presidents. The table uses the followin
F = federalist DR= democratic republican D = democrat W= whig
R=republi
x
P (x)
0
1
2
3
Total
Mean
P(x) - Mean
(P(x) - Mean)^2
0.22
0.03
0.0009
0.16
-0.03
0.0009
0.21
0.02
0.0004
0.16
-0.03
0.0009
0.0031
0.19 Variance
0.000775
Standard Dev
0.0278388218
x
P (x)
1
2
3
4
5
6
Quiz (module 2) examples (note that the quiz puts questions in random order, so the numbers here will NOT match the nu
1. In a poll of 500 people ages 15-20, 89% of the people said that they have a sm
Question 1
The table does not represent a probability distribution since
the sum of the probabilities = .75 and does not = 1, which is
one of the requirement for the table to be considered a
probabilt