STATS & PROBABILITY Flashcards
Is a measure that is used to
describe the population
PARAMETER
Is a measure that is used to
describe the sample
STATISTIC
a descriptive population
measure
PARAMETER
the number that describes
the sample
STATISTIC
mathematical technique that determines the number of
possible arrangements in a collection of items where the
order of the selection does not matter.
COMBINATION
is a frequency distribution using the means computed from all possible random samples of a specific size taken from a population.
Sampling distribution of sample mean
The _____________ distribution of sample means is the frequency distribution of the sample means taken from a population.
SAMPLING
The _____________ of the sampling distribution of the sample means is a bar graph constructed by plotting the sample means along the horizontal axis and the problem along the vertical axis.
HISTOGRAM
The _____________ of the sampling distribution of the sample means is equal to the mean of the population.
MEAN
Standard _____________ of the mean is the standard deviation of the sampling distribution of the sample mean.
ERROR
Mean is also called _____________ value.
EXPECTED
The set contains all data of
elements, individuals, or
measurements from your
experimenting space.
POPULATION
Average value of all data
from your population or
sample.
MEAN
It is a randomly selected
subset of the population
where the sample size is
denoted by n.
SAMPLE
It describes how spread the
population is.
STANDARD DEVIATION
The population is spread
perfectly symmetrical with
(σ) standard deviations
around the mean value.
NORMAL DISTRIBUTION
sampling distribution of
the mean approaches a
normal distribution, as
the sample size increases
CENTRAL LIMIT THEOREM
Student’s t-Distribution developed by ?
William Sealy Gosset in 1908
-This refers to the maximum number of logically independent values which vary in the data sample.
Degrees of freedom = n -1
Degrees of freedom
This refers to the maximum number of logically independent values which vary in the data sample
Degrees of freedom
The t-distribution is symmetrical at about __?
0
The t-distribution is bell-shaped like the normal distribution but has _______ tails.
heavier
Also called an interval estimate
Confidence interval
the probability that a Population parameter will fall between a set of values for a certain proportion of times.
Confidence interval
