Najwa Knefati Summary for ch7-8-9
The two major activities of inferential statistics are
(1) to use sample data to estimate values of a population parameters.
(2) to test hypotheses or claims made about population parameters.
First: Inferences from One po
Frequency Distribution
Cumulative
frequency
(Less Than)
Cumulative
frequency
(More Than)
Class Interval
Frequency
Relative
Frequency
0-5
7
0.226
7
31
5 - 10
7
0.226
14
24
10 - 15
10
0.322
24
17
15 - 20
7
0.226
31
7
SUM
31
1
Frequency Distribution
Cumulati
Probability
Distribution
Probability Distribution
What is Probability Distribution?
o A listing of the Sample Space for an event
along with the probability of each of the
outcomes
o Events must be mutually exclusive and allinclusive.
o Each event must hav
Chapter 10
Correlation and Regression
Correlation coefficient:
t test for correlation coefficient:
(d.f. n 2)
The regression line equation: y a bx
Chapter 13
z
Nonparametric Statistics
Table F
The t Distribution
Confidence
Table G
Degrees of
freedom
1
2
3
t\f
1. T
2. T
3. F
4.F
5.F
6.T
7.T
8.T
9.T
10. T
11. F
12. F
13. T
14. F
15. T
16. F
17. T
18. F
MULTIPLE CHOOSE
1. A
2. A
3. D
4. A
5. B
6. C
7. B
8. A
9. B
10. A
11. A
12. C
13. A
14. A
15. A
16. A
17. B
18. A
Short
A. find out standard deviation from
Q5 A bag contains 5 red and 3 green balls. Another bag contains 4 red and 6 green balls.
If one ball is drawn from each bag. Find the probability that one ball is red and one is
green.
A. 19/20
B. 17/20
C. 8/10
D.
Review: Chapter 3: Probability
1. Concepts:
(1)
Event
(2)
Simple event
(3)
Sample space
(4)
Basic Rules for Computing Probability
(a) Rule 1: Relative Frequency Approximation
(b) Rule 2: Classical approach
(c) Rule 3: Subjective Probabilities
(5)
Law of L
Q1 Two brother X and Y appeared for an exam. The probability of selection of is A 1/7
and that of B is 2/9. Find the probability that both of them are selected.
A. 1/63
B. 2/35
C. 2/63
D. 9/14
Solution: Let A be the event X is selected and B be the event
Hypothesis
Testing: Part I
Hypothesis Testing: Part I
Classical Approach and P-Value
Approach
o Classical Approach
1) State Ho and Ha.
2) Check requirements.
Random sample?
State what dist
State , and:
State the Rejection Rule, draw the graph,
and shade
RELATIVE
FREQUENCY
METHOD
RELATIVE FREQUENCY METHOD
Relative Frequency Method
o Probability is determined by running an
experiment using the resulting frequencies.
RELATIVE FREQUENCY METHOD
Example: Tossing a Die
o I tossed a die 600 times and the results
t\f
1. T
2. T
3. F
4.F
5.F
6.T
7.T
8.T
9.T
10. T
11. F
12. F
13. T
14. F
15. T
16. F
17. T
18. F
MULTIPLE CHOOSE
1. A
2. A
3. D
4. A
5. B
6. C
7. B
8. A
9. B
10. A
11. A
12. C
13. A
14. A
15. A
16. A
17. B
18. A
Short
A. find out standard deviation from t
Statistical hypothesis testing
A statistical hypothesis test is a method of statistical inference using data from a scientific study. In
statistics, a result is called statistically significant if it has been predicted as unlikely to have occurred
by chan
Statistics
INTRODUCTIO
Statistics means numerical information expressed in quantitative terms,
from a layman. This information may relate to objects, subjects, activities,
phenomena, or regions of space. As a matter of fact, data have no limits as
to thei
Assignment No. 2 week5-week7
Student Full Name:
Student ID:
CRN No:
Branch:
STATISTICS
(STAT-101)
Total Points
True/False
_/6
MCQ
_/6
Short Answer
_/18
Total
_/30
Good Luck
STATISTICS (STAT-101)
Marks- 30
Answer all the Questions on the same question p
:Q1
Total Revenue - Total Expenses = Net Income
190,000=400,000-210,000
:Q2
Net Income\total assent
13,764
9.3% =2\(120,000+176000)
:Q3
The going concern principle is the assumption that an entity will remain in business for the
.foreseeable future
The fu
Transportation Problems
Transportation Problem
The transportation problem seeks to
minimize the total shipping costs of
transporting goods from m origins or sources
(each with a supply si) to n destinations
(each with a demand dj), when the unit
shipping
Assignment- 2 - STAT-201
Q1. Use simple exponential smoothing with = 0.33 to forecast the tire sales for February
through May. Assume that the forecast for January was for 22 sets of tires. Also find the
Tracking Signal.
(5)
Automobile
Battery Sales
28
21
Amani Bin Nagah
S130066030
STAT2
Q1. Use simple exponential smoothing with = 0.33 to forecast the tire sales for February
through May. Assume that the forecast for January was for 22 sets of tires. Also find the
Tracking Signal.
(5)
Month
January
February
Amani Bin Nagah
S130066030
STAT201
Q1. Find the optimal solution whose objective function is
Z = 50x + 18y
Subject to
2x+ y = 100
x + y = 80
X ,Y 0
Solution:
find tow points to make a line :
- put y=0 , 2x+0=100
2x=100
x=50
so (50,0) is a point on the li
Assignment STAT 201 Marks 3 +7 =10
Q1. J Bannerman sells Golf Clubs. How much profit/loss is made when 5000 golf clubs are sold?
Each Golf Club is sold for 20, Variable Costs per golf club are 10 and Fixed Costs total 24,000. (3)
Q2.
Even though independe
Amani Khmis Bin Nagah
S130066030
Quantitative Methods
Assignment 1:
Q1. J Bannerman sells Golf Clubs. How much profit/loss is made when 5000 golf clubs are sold?
Each Golf Club is sold for 20, Variable Costs per golf club are 10 and Fixed Costs total 24,0
Amani Bin Nagah
S130066030
Q1. The maintenance department of a large hospital uses about 180 cases of liquid cleanser
annually. Ordering costs are $25, carrying costs are $5 per case a year, and the new schedule
indicates that orders of less than 45 cases
Instructor: Fayed Alshammri Assignment: Exercise 3
Course: Stat 101 SEU
Book: Triola: Elementary Statistics
Using the TI 83/84 Plus Calculator, 3e
A simple random sample of pages from a particular dictionary was obtained. Listed below are
the numbers of
A.
B.
C.
D.
A.
B.
C.
D.
A.
B.
A.
B.
C.
D.
E.
A.
B.
C.
D.
E.
A.
B.
C.
D.
A.
B.
C.
D.
Parameter because the value is a numerical measurement describing a characteristic of apopulation.
Quantitative
Number of suitcases on a plane
Nominal
Experiment
A prospec