Introduction to Statistics
Liberty University's Dr. Moone's 1st quiz in class.
Statistics are numbers
Statistics is the study of data
The procedures used to organize and summarize numerical data
The methods used to find out something about a population, based on a sample, generally we prefer to use a random sample for making inferences
The set representing all measurements of interest to the researcher
Is a subset of measurements selected from the population of interest
Refers to a quantity that characterizes a population.
Refers to a quantity characterizes a sample.
X with a line on top
Sample Mean symbol
Population Mean symbol
Population Standard Deviation
A sample consisting of the entire population
When observations on the same phenomenon do not change in successive trials, the phenomenon is called?
When observations on the same phenomenon vary from trial to trial, the phenomenon is called a?
A variable whose observations vary in kind but not in degree
A variable whose observations vary in magnitude from trial to trial
A measurement that is used to refer to data that can only be classified into categories.
Observations are ordered or ranked
Observations ordered in such a way that distances between them are meaningful
Observations ordered in such a way that not only distances between them are meaningful but also ratios can be formed with levels of the scale
A Collection of procedures and Principles for gaining and processing information in order to make decisions when faced with uncerntainty.
Does not represent the entire population fairly
Result of one number or quantity divided by another
a special type of ratio in which the denominator includes the numerator.
The amount, number or rate of something, regarded as part of a total of 100
The occurrence of a particular outcome is found by dividing the actual number of occurrences by the number of possible outcomes.
Average of all individuals in the population
Average of all individuals in the sample
The distribution is the value such that p percent of observations fall at or below it
Individual observations that fall well outside the overall pattern of data
Population Geometric Mean
a type of mean or average, which indicates the central tendency or typical value of a set of numbers.
Any value which we cannot predict exactly
Any experiment or process which produces some unpredictable or random values
Any experiment or process which produces values which can all be predicted exactly
Induction using data from a random process or experiment
Each of the distinct results of an experiment
Set of all possible outcomes of an experiment
A collection of outcome or subset of the sample space.
The occurrence of any one event means that none of the others can occur at the same time
Must be shaded Twice
Must be shaded once
if two events A and B are not mutually exclusive
Law of multiplication
two events A, and B are independent if the occurrence of one event has no effect on the chance of occurrence of the other event.
_____ events cannot occur simultaneously
A or B
Venn- A, middle, B are shaded.
A and B
Venn- middle only shaded
A and not B
Venn- only A is shaded without middle.
Not A and B
Venn- only B is shaded and not middle
Venn- Everything but A and middle is shaded
Venn- Everything but B and middle is shaded
Not A and Not B
Venn- Only the outside is shaded
Not A or Not B
Venn- Everything but middle is shaded
Not A or B
Venn- Only outside is shaded this is a (or)
Not A and B
Venn- everthing but middle this is a (and)
What is the branch of statistics called for which we draw conclusions from sample data?
Political Party Affiliation is an example of what level of measurement?
Categories of gross annual income: Superior/ good/ average/ poor isan example of what level of measurement?
P(A) + P(B)- P(A and B)= P(A or B)
Addition Law's equation if they are not mutually exclusive
P(A) + P(B)= P(A or B)
Addition Law's equation if they are Mutually exclusive
P(A) x P(B)= P(A and B)
Law of Multiplication equation
P(A l B) = P(A and B) / P(B)= P(A)
Conditional Probability's equation
With replacement of what is in the event
Without Replacement of what is in the event
The number of pencils produced daily (classify)
The amount of rainfall in a month (classify)