MA3110
Module 3 Exercise 3.2
Sampling Distribution and Confidence Interval
By Terry Lamoreaux
Module 3: Exercise 3.2 Sample Mean Distribution and T-Interval
Task 1
Student1
Student2
Student3
Student4
Student5
Student6
Student7
Student8
Student9
Student10
Statistics Coin Toss DISCUSSION 2.1(1.5 HOURS)
Title: Expected Results
Perform the following activity:
Flip a coin 10 times and record the number of times it lands on heads and the number
of
times it lands on tails.
Then, flip a coin 20 times, recording t
Shaun Y. Lewis
MA3110 Exercise 2
Module 2 Probability and Normal Distribution/Determining Discrete Probability Distributions
Solve the following problems:
In the table below, the random variable x represents the number of cups or cans of caffeinated bever
MA3110 STATISITICS
Module 2 Probability and Normal Distribution
By Terry Lamoreaux
In the table below, the random variable x represents the number of cups or cans of caffeinated beverages
consumed by Americans each day, based on data from the National Sle
MA3110: STATISTICS
Module 2 Exercise 2
By Terry Lamoreaux
Module2 Exercise 2
Task 1
10
9
8
7
6
Frequency
5
4
3
2
1
0
X
CBS
FOX
ABC
f
9
6
5
CBS
FOX
ABC
5
9
6
CBS
FOX
ABC
The most accurate graphical representation is the pie chart as it shows the part of th
MA3110 QUIZ
Week 4 Quiz
1. True or False: The Mean of a sampling districution of sample means is equal to the population
mean
Answer - True
2. Assume we want the estimate the mean cost of computer repairs for the population of
consumers. How many consumer
MA3110
Module 3 Exercise 1
Interpreting the Confidence Interval
By Terry Lamoreaux
Module 3: Exercise 3.1 Interpreting the Confidence Interval
A simple random sample of 40 salaries of NCAA
n = 40
= 415,953
= 463,364
x =
463364
=73,264
40
95% confidenc
MA3110 Statistics
Quizzes and Exams
QUIZ 3 QUESTIONS
1. A statistician wants to estimate the mean age of all college students. A random sample of 25
students indicates that the mean age is 24.6 years. Past studies showed that the standard deviation
is 1.3
MA3110
Week 5 Exercise 5.2
Chi Square and Anova
By Terry Lamoreaux
What is the population under consideration?
The Presidents of the US.
What are the two variables under consideration?
The two variables under consideration are the region of birth and poli
MA3110: Module 1 Introduction to Statistics
Discussion 1.1
Representing Data Graphically
Consider the following data sets:
A collection of how many minutes someone spends online in a day
The number of students that said yes or no to whether or not they ha
Statistics V4.0 MA3110
WEEK 1
TERRY LAMOREAUX
Task 1
1.1
a. Population - The collection of all individuals or items under consideration in a statistical study.
b. Sample - That part of the population from which information is obtained.
1.7 Inferential bec
Page 1 of 2
Ronald Horne
The scatter plot of Wins versus Difference is shown below.
The scatter plot of Temperature (F) versus Chirps in 1 Min is shown below.
Page 2 of 2
Ronald Horne
The control charts for Week 1 & Week 2 depict that the plotted sample p
Page 1 of 2
Ronald Horne
What is the population under consideration?
The Presidents of the US.
What are the two variables under consideration?
The two variables under consideration are the region of birth and political party of US presidents.
Group the bi
MA3110
Module 4 Hypothesis Testing
Exercise 4.1
By Terry Lamoreaux
[Email address]
EXERCISE 4.1
TASK 1:
A student of the author surveyed her friends and found that among 20 males, 4 smoke and
among 30 female friends, 6 smoke. Give two reasons why these re
MA3110
Week 5
Discussion
Yes, we would be able to conduct a goodness of fit test for this experiment.
Condition 1 : The sampling method is simple random sampling.
Condition 1 is obviously true.
Condition 2 : The sample data consist of frequency counts for
MA3110
MA3110
Exercise 5.1
Module 5 Chi Square and Anova
By Terry Lamoreaux
Task 1: Consider the three samples listed in the table:
A
1
3
B
0
6
5
2
5
2
C
3
1
2
6
3
Obtain the sample mean and the sample standard deviation of each of the three samples.
Samp
MA3110 Week 5 Quiz
A poll is conducted with 1434 randomly selected US adults. The poll showed that 72% of the
respondents support gun rights. The sample results are n=1434 and
. Find the
Confidence Interval that corresponds to a 95% confidence level.
a) n
MA3110
Linear Correlation
Exercise 6.1
By Terry Lamoreaux
The computed correlation coefficient between these two variables is 0.8717 and the critical value
from the table is 0.754.
As the correlation coefficient is more than the critical value at 0.05 sig
Shaun Y. Lewis
MA3110 Exercise 2
Module 2 Probability and Normal Distribution/Determining Discrete Probability Distributions
Solve the following problems:
In the table below, the random variable x represents the number of cups or cans of caffeinated bever
Shaun Y. Lewis
MA3110 Statistics
Exercise 2.2 Tasks 1 and 2
Module 2 Probability and Normal Distribution
Task 1
Each chart can be as appropriate as the other, depending on how it needs to be
presented. For example, the pie chart works better when data nee
Exam #1
07/15/2013
1.
Qualitative
Variables
Title
8 Mile
Alone in the Dark
Aviator
Big Fish
Bourne Identity
Break-Up
Charlie's Angels: Full Throttle
Collateral
Crash
Daddy Day Care
DaVinci Code
Eternal Sunshine of the Spotless Mind
From Justin to Kelly
Ha
Page 1 of 1
Ronald Horne
Task 1
The obtained sample means and standard deviations are given below,
A
Sample Mean
Sample SD
B
3
2
C
3
2.45
6
4.24
SST = 110
SSTR = 24
SSE = 86
The constructed one way ANOVA table is given below,
ANOVA
Source of
Variation
Bet
First to compute the frequency, the expected frequency for the category I is e=npi, where pi is
the probability of the ith category.
SID
E
SH
OW
ING
Pi
E
1
2
3
4
5
6
1/6
200
/6
1/6
200
/6
1/6
200
/6
1/6
200
/6
1/6
200
/6
1/6
200
/6
To test the claim that
Richard Surguy
MA3110
5-21-16
Exercise 5.1
Task 1
Consider the samples listed in the table
A
1
3
5
B
0
6
2
5
2
C
3
12
6
3
Answers:
N
Mean
Variance
Std. Dev.
Std. Err.
1
3
9
3
35
4
2
1.15
2
5
15
3
69
6
2.45
1.10
Standard weighted Means analysis
Anova Summa
Maurice Henderson
MA3110 Statistics
Exercise 1.1
Task 1
1.1
Population- the collection of all individuals or items under consideration in a statistical study.
Sample- That part of a population form which information is obtained.
1.7
This would fall under
Richard Surguy
MA3110
4-29-16
Exercises 6.2 page 257
6.56
A: P ( Z < - 0.87 ) = 1 P ( Z < 0.87 ) = 1 0.8078 = 0.1922
B: P ( Z < 3.56 ) = 0.9998
C: P ( Z < 5.12 ) = 1.0000
6.58
A: P ( Z > 2.02 ) = 1 P ( Z < 2.02 ) = 1 0.9783 = 0.0217
B: P ( Z > -0.56 ) = P
Richard Surguy
MA3110
5-23-16
Module 6: Exercise 6.1 Linear Correlation
The obtained scatter plot is given below,
The computed correlation coefficient between these two variables is 0.8717 and the critical value
from the table is 0.754.
As the correlation