Ma 111- Week 4- Discussion Forum
In the later part of this weeks lesson, I introduced the Empirical Rule. It is a
valuable and interesting rule which uses standard deviation to describe the
spread of data which is normal (bell-shaped) in nature. This rule

Quiz # 13
Question 1
2 out of 2 points
A 99% Confidence Interval is wider than a 95% Confidence Interval when
computed based on the same sample data.
Selected
Tru
Answer:
e
Correct
Tru
Answer:
e
Question 2
2 out of 2 points
If samples of size 15 are chose

MA 111- Discussion Board- Week 3
This weeks lesson involved the use of the TI83/84 graphing calculator. I would like you
to use this weeks discussion board to comment on a few ideas:
1.) How was your experience using the TI84/84? Did you have any prior ex

Homework # 11
Due Date: Sunday, March 22, 2015
MA111 Probability & Statistics
Please show all work.
Section 6.2:
2 , 5 , 6 , 8 , 10 , 14 , 15
For each problem above, I want to see the probability that you are trying to find [ P( ) ],
the normalcdf( ) comm

Homework # 5
MA111-Probability&Statistics
Due Date: Sunday, February 8, 2015
Please turn in solutions along with all work to each problem listed below.
Use the TI83/84 to compute Descriptive Statistics:
The data below represents the length of time in year

Homework 15
SEC. 7 3
P. 4. Like 5 below
Book formula for estimation of p and Table of Z for 90 % Z1/2 value !
Z1/2 = 1.645
p between 0.388 and for 0.492 with 90 % confidence
P.5
p=55/450 =0.12
q=1-p=1-0.12=0.88
Z1/2 =1.96 for 95 % confidence
0.12 + / - 1.

Quiz # 12
Question 1
2 out of 2 points
The Central Limit Theorem states that random samples chosen from a given population
will have averages that form a normal distribution if and only if the distribution from
which the samples were chosen formed a norma

Homework 15
SEC. 8 2
P. 2
a. Ho; mean = 3262
H1; mean # 3262
b. . Critical Value = - / + 1.96 for confidence level a=0.05
Root square of 50 = 7.071
c. Test Value Z=(2995-3262) / 1100 /7.071 = - 267 /155.56= - 1.716
d. Dont reject Ho
e. Its significant evi

MA 111- Homework 3 (#8) By Hand
A researcher wishes to determine if there is a relationship
between the number of days an employee missed a year and the
persons age. Draw a scatter plot and comment on the nature of
the relationship.
Age, x
Days missed, y

Homework # 6
MA111-Probability&Statistics
Due Date: Sunday, February 15, 2015
Please turn in solutions along with all work to each problem listed below.
Section 4.1: 10 , 12 , 14 , 15 , 16 , 20 , 24 , 29 , 40

Homework # 12
Due Date: Sunday, March 29, 2015
MA111 Probability & Statistics
Please show all work.
Section 6.2:
18 , 19 , 22 , 25 , 26 , 30
Note: Please use the distributions built into the TI83/84 to answer these
problems. Write the distribution used, t

Cards
Term
Definition
Statistics
Term
The science of conducting studies to collect,
organize, summarize, analyze, and draw
conclusions from data.
Definition
Variable
Term
A characteristic or attribute that can assume
different values (the final exam grade

Question 1
2 out of 2 points
A chi-square distribution is negatively skewed.
Selected
Answer:
Answers:
Fals
e
True
Fals
e
Question 2
2 out of 2 points
Sample proportions will always form a normal distribution.
Selected
Answer:
Answers:
Fals
e
True
Fals
e

A poll of Democrats, Republicans and Independents was held and CNN reported
the information gathered by using a graph similar to the one below. The question
was whether they agreed with the courts decision to remove the feeding tube.
Sixty-two percent of

Week 13 Homework
PLEASE follow all others problems solutions
like this 11 using it for you as as your SAMPLE !
SEC. 7 1
P. 11
a. X =16.6 is the point estimate for population mean
b. Confidence level (1-a)=0.95 Za/2= Zo.o25 =1.96
Root square of n=35 =5.916

1. Chapter 1
Summary
The two major areas of statistics are descriptive and inferential. Descriptive statistics includes the
collection, organization, summarization, and presentation of data. Inferential statistics includes
making inferences from samples t

Homework # 4
MA111-Probability&Statistics
Due Date: Sunday, February 1, 2015
Please turn in solutions along with all work to each problem listed below.
For Part A:
Section 3.1:
2 , 5 , 6 , 32 , 33
Note: You are not responsible for Midrange so you can igno

Homework # 2
MA111-Probability&Statistics
Due Date: Sunday, January 18, 2015
Please turn in solutions along with all work to each problem listed below.
Section 2.1: 7 , 11 , 16
Please be sure to show all work (i.e., how you determine class width, etc.)
Se

Homework # 3
MA111-Probability&Statistics
Due Date: Sunday, January 25, 2015
Please turn in solutions along with all work to each problem listed below.
Section 2-4:
8 (by hand)
Section 10-1:
15 , 20
Note: For problems #15 and 20, I want you to use the TI8

MA 111- Probability and Statistics
Homework # 12
Section 6.2: 18, 19, 22, 25, 26, 30
18. Middle Limit 50%
Lower limit (X1-mean)/ SD= z for 25%
Second upper (X2-means/SD= z for 75%
X btw. X1= 722.99 and X2 =861.01
19. Middle = 80%; 40% of the area ( probab

Week 11 Homework
SEC. 6 2
ALL probabilities from Table based on Z score
( computing Z - scores using formula in book or as shown in problems 14 +
15 bellow ! )
P. 2
P (35,000<X<45,000) =0.3031
P (X > 40,000) = 0.9131
P ( X< 31,000) = 0.0016
P. 5
P (200<X<

Sample Midterm Exam
MA 111 - Probability & Statistics
Name:
Please show all work on this exam paper. Good Luck!
1.
The age of the signers of the Declaration of Independence are shown below.
41 54 47 40 39 35 50 37 49 42 70 32 44 52 39 50 50 38
50 40 30 34

Exercises 62
Seelii- 62 Applications ofioNormaJ Dim-teem 323
l. Admission ChargeiorMovies The average early-bird
special admission price for amovie is $5.8 LIfthe
distribution of nnvie adm'nsion charges isapproximately
rlJrrnal with astandard deviation