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53 Cards in this Set

  • Front
  • Back
mean, median, mode,
Frequency distribution of grouped and ungrouped data
chapter 2
Histograms from data
Measuring Central Tendancy
pp 109, 107, 125
find the mean of distribution
sampeling using xbar
pp 124-125 and 126
probablility favorable vs. total favorable/total
pp 182
probability it will happen
probability it won't happen
addition rules for probability
p 194 4-3
permutation is an of objects in a specific order
pp 224\
using probability use combinations in one place rules for probability
Discrete probability
standard deviation of probability
chap 5-1
Nominal level of measurement
zip codes, gender, political affiliation
Ordinal level of measurement
can be ranked, abcd, first, second
Interval-Level data
ranks data and precise differences between units of data, howver no meaningful 0, sat score
Ratio level of measurement
posseses all charictoristics of interval measurement and there exists a 0, height, weight, salary, age
four measurement scales
nominal, ordinal, interval, and ratio
What is probability
are variables that can be classified in distinct categories
are numerical and can be numbered or ranked
Discrete variables
assume values that can be counted
countinous variables
can assume an infinite number of values between any two specific values. They are obtained by measureing. Often are fractions and decimals.
independent variable in an experimental study is the one that is being
manipulated by the researcher
the independent variable is also called the
explanitory variable
the dependant variable is the
resultant variable or the outcome variable
descriptive statistics
consists of the collection, organization, presentation and summarization of data.
inferential statistics
consists of generalizing from samples to populations, performing estimations and hypothesis tests, determining relationships among variables, and making predictions.
Discrete variables
assume values that can be counted
random sample
are chosen by chance
arithmetic average
score that has as many x's above and below
score that occurs most
the number of times the number repeats
a permutation is an arrangement of n objects in a specific order
! 5!=5*4*3*2*1=120
probability is equal to
favorable / total
symbol μ (Greek: mu) is used to denote
the arithmetic mean of an entire population
sample standard deviation
s sq
sample variance
popoulation standard deviation
σ sq
Population variance
Summation notation
Simple mean
number of permutations of n objects taking r objects at a time. In a certain order
Number of combinations of n objects taking r objects at a time
Counting rules fundemental
toss a coin and roll die = 2x6 or 12 and repititions are permited
Counting rules permutation
repitions are not permited, then the numbers decrease by 1 for each place left to right. 5! = 5*4*3*2*1=120
Counting rules combination
total combination possibles
Data aray
when data is sorted in order