Table IV Standard Normal Distribution Table
The entries in this table give the
cumulative area under the standard
normal curve to the left of z with the
values of 1 equal to 0 or negative.
A
z 0
ll
Review Test 1-STAT 2023
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The following pie chart presents the percentages of fish caught in each of four ratings
categories.
Match this pie chart with
Introduction to the
Microscope
Care
Parts
Focusing
Types of Microscopes
Light Microscope - the models found in most schools, use
compound lenses to magnify objects. The lenses bend or
refract light to make the object beneath them appear
closer.
Common m
Microscope
Presented by
R.Parthasarathy
TERMS AND DEFINITIONS
Principle
Microscopy is to get a magnified image, in which structures may be
resolved which could not be resolved with the help of an unaided eye.
Magnification
It is the ratio of the size of a
Introduction to the
Microscope
Types of Microscopes
Care
Parts
Focusing
Types of Microscopes
Light Microscope - the models found in most schools, use
compound lenses to magnify objects. The lenses bend or
refract light to make the object beneath them
Microscopes
Section 3-1
History of the
Microscope
1590 first
compound microscope
History of the
Microscope
1655 Robert Hooke used
a compound microscope to
observe pores in cork
He called them cells
History of the
Microscope
Antoine van
Leeuwenhoek
1st to
Happiness
A random sample of 40 countries was selected. For each of the countries, the variables described below was collected.
Variable
Happy
EcoFee
GDPpc
Unemp
Life
Risk
Description
An index (0 to 10) of sbujective wellbeing
An index (0 to 100) of econo
P1: OSO
FREE013-TABLE
FREE013-Moore
September 4, 2008
Table entry for C is the critical
value t required for confidence
level C. To approximate one- and
two-sided P -values, compare the
value of the t statistic with the
critical values of t that match
the
Descriptive Statistics: Graphs 1
Area Principle for graphs the area occupied by a section of a graph is proportional to the percentage
of data represented by that section (except in the timeplot and boxplot which are constructed on
different principles).
Measure of Center
the value at the center or middle of a data set
!
!
Arithmetic Mean (Mean or average)
the measure of center obtained by adding the values and dividing the total by the
number of values
!
!
Mean Advantages
Is relatively reliable, means of
p hat=
the success/n
!
If p-value his < or equal to alpha then.
we reject Ho
!
!
if p-value is > alpha then.
we fail to reject Ho
!
For 2 samples, what does the Ho always look like?
M1-M2
!
!
What is the degrees of freedom rule for dependent samples?
n-1
Statistics
The art and science of collecting, analyzing, presenting, and interpreting data.
!
!
Data
The facts and figures collected, analyzed, and summarized for presentation and
interpretation.
!
Data Set
All the data collected in a particular study.
!
Causal Comparative design
describes a true experiment except for the fact that the groups were not randomly
assigned but can be analyzed with a test of significance just like a true experiment.
!
!
Ex post facto or after the fact design
can be analyzed wi
Least Squares Sense
Mean is the closets value to all the numbers in the data set
!
!
Median
the middle number in the data set
!
Mode
the most frequently occurring number
!
Variability
Describes how consistent scores are with each other
!
Range
Xmax - Xmin
sample
subset of a population
!
population
every individual
!
!
!
random
each individual has equal probability of being selected
!
!
stratified
proportional to the size of a demographic in a population
!
!
voluntary
contains only those individuals that ch
Math Homework (3.2)
I. Measures Of Dispersion
!
!
a. Dispersion is the degree to which the data are spread out.
b. The purpose of these measures is to describe the typical value of a
variable.
A. Compute the Range of a Variable from Raw Data
a. Range is t
Math Homework
I. The Measures of Central Tendency
!
!
!
!
!
a. A measure of central tendency numerically describes the average or
typical data value.
b. Three measures of central tendency are most widely used: mean, median,
and mode.
A. Determine the Arit
!
Math Homework (3.3)
!
I. Measures of Central Tendency and Dispersion from Grouped Data
a. Discussing how to compute descriptive statistics from raw data.
b. While we cannot obtain exact values of the mean or standard
deviation without raw data, these me