MA3110 Statistics
MA3110 Statistics
Exercise 2.2 Data Representation and Binomial Probability Distribution
Exercise 2.2
Task 1
1
MA3110 Statistics
Percentage each name comes up
5; 25%
6; 30%
ABC
CBS
Fox
9; 45%
Chart Title
CBS
ABC
Fox
0
1
2
3
4
Series 1
5
MA3110
Statistics
Contingency and Goodness-of-Fit Test
A student drilled a hole in a die and loaded it with lead weight then rolled the die 200 times. The observed
frequencies for the outcomes of 1, 2, 3, 4, 5, and 6 are respectively 27, 31, 42, 40, 28, a
MA3110
Statistics
Chi Square Procedures
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
president
MA3110
Statistics
Linear Correlation
In this exercise, you will solve three questions, where you will be asked to calculate a linear
correlation coefficient and determine whether there is a linear correlation between the two given
variables.
Solve the fol
MA1310 Statistic
Task 1
Exercise 1.1 Define the following Terms
a. Population Collection of all individuals or items under consideration in a statistical
study.
b. Sample Part of the population from which information is obtained.
1.7
a. It would be Infere
MA3110
Statistics
Exercise 4.1
Inferences from Two Proportions and Samples
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 results should not
be us
MA3110
Statistics
Interpreting the Confidence Interval
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.
X = 415,953
Construct a 95% confidence interval estimate of the mean sala
MA3110
Statistics
Exercise 4.2
Hypothesis Testing
Examine the given statement:
The proportion of people aged 18-25 who currently use illicit drugs is equal to 0.20 (or
20%). Express the null hypothesis H0 and the alternative hypothesis H1 in symbolic
form
MA3110 Statistics
MA3110 Statistics
Exercise 2.1
Determining Discrete Probability Distributions
Solve the following:
1. In the table below, the random variable x represents the number of cups or cans of
caffeinated beverages consumed by American each day
MA3110
Statistics
Sample Mean Distribution and T-Interval
Task 1- Green M&Ms
a. Find the sample means for each students green M&M count.
Student #:
1
# of green
M&Ms total
34 55
#of green
6.
M&Ms per bag 8
2
11
3
4
5
6
62
56
60
12
.4
11. 12
2
7
8
9
10
11
MA3110
Statistics
Inferences from Two Samples
Task 1 Consider the samples listed in the table
A
1
3
5
B
0
6
2
5
2
C
3
12
6
3
Obtain the sample mean and the sample deviation of each of the three samples:
A= 1, 3, 5 Sample mean value = 3
B= 0, 6,2,5,2 Sampl
CBS
FOX
ABC
FOX
ABC
CBS
CBS
FOX
CBS
CBS
CBS
CBS
ABC
FOX
CBS
FOX
ABC
CBS
FOX
ABC
CBS
FOX
ABC
FOX
ABC
CBS
CBS
FOX
CBS
CBS
CBS
CBS
ABC
FOX
CBS
FOX
ABC
CBS
FOX
ABC
10
9
8
7
6
5
4
3
2
1
0
Tiffany Campbell
9/29/2014
CBS
FOX
ABC
Column H
CBS
FOX
ABC
CBS
FOX
ABC
Tiffany Campbell
9-29-14
MA3110
I had chosen the Bar Chart it gives you more detain on the probability of who
watches what stations while the pie chart only breaks it down by color or
sizes. That you really cant tell what or who is what in the chart.
x
P(x)
0
1
2
3
mean
average
0.22
0.16
0.21
0.16
Tiffany Campbell
Week 2.1 Exercise
0.185
0.027726
average
Column B
mean
0
Mars Inc. 24% sample of 100 M&M's
Mean:
Standar:
24
4.27
0.05
0.1
0.15
0.2
Tiffany Campbell
Exercise 5.1
A
B
1
3
5
C
0
6
2
5
2
Highway Gas StationConvience Store
952
1298
844
996
1195
921
839
1174
880
1088
1113
706
1024
953
602
1280
614
3
12
6
3
24
Mean A
Mean B
Mean C
9
15
48
stand
stand
stand
2
2.44949
8.848729
average
24
aver
Tiffany Campbell
MA3110
Exercise 1.1
Task 1
1.1
Define the following items:
A. Population: The collection of all individuals or items under consideration in
a statistical study.
B. Sample: The part of the population from which information is obtained.
1.7
Adrienne Brown
Exercise 6.1
November 21, 2014
Linear Correlation
In this assignment, you should solve three questions, where you will be asked to calculate a linear correlation
coefficient and determine whether there is a linear correlation between the tw
Chris Alvarado
April 15, 2015
Statistics
Exercise 4.1
Title: Inferences from Two Proportions and Samples
Task 1: Solve the following problems: A student of the author surveyed her friends and
found that among 20 males, 4 smoke and among 30 female friends,
Chris Alvarado
April 8, 2015
Statistics
3.1 exercise
Answer: N=40
X-bar = 415,953
Standard Deviation= 463,364
95% confidence=1.97
The margin for error is (463364 times 1.65) divided by the square root of 40. This will give you an
answer of 143597.9
For th
Gary Norton
Exercise 5.1
Title: Inferences from Two Samples
This exercise has the following two tasks:
Task 1: Consider the three samples listed in the table:
A
B
C
1
0
3
3
6
12
5
2
6
5
3
2
Obtain the sample mean and the sample standard deviation of each
Chris Alvarado
April 15, 2015
Statistics
4.2 Exercise
Title: Hypothesis Testing
Solve the following problems: Examine the given statement: The proportion of people aged 18
25 who currently use illicit drugs is equal to 0.20 (or 20%). Express the null hypo
Gary Norton
MA1615
Week 1
Task 1
1.1
Population:
The collection of all individuals or items under consideration in a statistical study.
Sample:That part of the population from which information is obtained.
1.7
It is inferential because this one is from a