One Variable/Two Variable Data
Statistics is the study of
What is Variability?
The entire group of individuals we want information about is
What is Population?
An activity whose outcome can be observed or measured but we do not know how it will turn out on any single trial
What is an experiment or chance experiment?
The use of a standard normal table to compute the probabilities of x-bar from a large random sample
What is the Central Limit Theorum?
If there is a 95% or greater chance that an experimental outcome is not due to chance we say that the result has
What is statistical significance?
In skewed-right distributions, what is most frequently the relationship of the mean, median, and mode?
What is mean > median > mode?
A study that collects data from a sample that is chosen to represent a specific population
What is Sample Survey?
The relative frequency of an outcome
What is the probability of an event?
An estimate of the standard deviation of the sampling distribution of x-bar
What is Standard Error of x-bar?
Sandy scores a perfect 100 on a test that everyone else fails. If we were to graph this distribution, it would be
What is positively skewed?
What is a characteristic that changes from one individual to another?
What is Variable?
Sample chosen in such a way that every group of n individuals in the population has an equal chance to be selected as the sample
What is Simple Random Sample?
When two events can have no outcomes in common
What is mutually exclusive?
The discrepancy between the observed and expected counts
What is the chi-square test statistic?
For a language test with normally distributed scores, the mean was 70 and the standard deviation was 10. Approximately what percentage of test takers scored 60 and above
What is 84?
A correlation shows that two variables are
What is related?
A chance device that is used to select experimental units or conduct simulations
What is Random Digit Table or Random Number Generator?
P(A|B), which =P(A and B)/P(B)
What is conditional probability?
Does a parameter have variability
What is No?
Jose hypothesizes that a new drug he has just invented will enhance mice's memories. He feeds the drug to the experimental group and gives the control group a placebo. He then times the mice as they learn to run through a maze. In order to know whether his hypothesis has been supported, Jose would need to use
What is inferential statistics?
What type of correlation describes the following sentence:
The "temperature outside" and the "number of hot chocolate sold" at a football game.
What is Negative?
A sample in which every element in the population has a known statistical likelihood of being selected
What is probability sample?
P(A or B) = P(A) + P(B) - P(A and B)
P(A and B) = P(A) * P(B|A)
What is addition rule and multiplication rule?
The hypothesis which is assumed to be true until evidence is found to disprove or contradict it is the
What is the null hypothesis?
Nitya scored a 145 on an IQ test with a mean of 100 and a standard deviation of 15. Her z-score is
What is +3?