MTH-2210- Applied Statistics
Spring 2016
Chapter 20 : Inference about a Population Mean
Professor: Dr.Wijekularathna, D.K.
20.1
University: Troy University
Conditions for inference about a mean
1. We can regard our data as a simple random sample (SRS) fro
MTH-2210- Applied Statistics
Spring 2016
Chapter 15 : Sampling Distributions
Professor: Dr.Wijekularathna, D.K.
15.1
University: Troy University
Parameters and statistics
Parameter
A parameter is a number that describes the population. In practice, the va
Algorithms
O BJ E CT I V ES :
1 . L E A R N W H AT A L G OR I T H M S A RE A ND W H AT
P R OP E R T I E S T H E Y H AV E.
2 . S T U D Y S OM E C O M M ON S EA RC H A ND S O RT
A L GO R I T H M S .
I. Algorithms and their properties
Many mathematical quest
Section 4.1:
24.
a) a 43 (mod 23) and 22 a 0
43 mod 23 = 20
So, a mod 23 = 20
We have: -3 mod 23 = 20 and 22 -3 0
Thus, a=-3
b) a 17 (mod 29) and 14 a 14
17 mod 29 = 17
So, a mod 29 = 17
We have: -12 mod 29 = 17 and 14 -12 14
Thus, a=-12
c) a 11 (mod 21)
Section 3.3
16. A day has 24hours*60minutes*60seconds=86400 seconds
Operations in a second= 1second/10-11=1011
Operations in a day=864*1013
a) log n = 864*1013
13
86410
n=2
b) 1000n = 864*1013
n=
864001011
=86410 10
1000
c) n2 =864*1013
13
n= 86410 929
Section 3.1
52. We use as many quarters (25 cents) as we can, then dimes (10 cents), nickels (5 cents) and
pennies (1 cent)
a)
89 cents
89 mod 25 = 14 cents
14 mod 10 = 4 cents
4 cents
b)
3 quarters
1 dimes
0 nickel
4 pennies
49 cents
49 mod 25 = 24 cents
MTH-2210- Applied Statistics
Spring 2016
Chapter 21 : Comparing Two Means
Professor: Dr.Wijekularathna, D.K.
University: Troy University
Comparing two populations or two treatments is one of the most common situations encountered in statistical
practice.
MTH-2210- Applied Statistics
Spring 2016
Chapter 17 : Tests of Significance: The Basics
Professor: Dr.Wijekularathna, D.K.
17.1
University: Troy University
The nature of Hypothesis testing
We often use inferential statistics to make decisions or judgments
MTH-2210- Applied Statistics
Spring 2016
Chapter 16 : Confidence Intervals
Professor: Dr.Wijekularathna, D.K.
16.1
University: Troy University
Statistical Inference
Statistical inference provides methods for drawing conclusions about a population from sam