Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
The central limit theorem is important in the study of statistics because it allows us to,
|
Calculate probabilities using the distribution of the sample mean for any shaped population, so long as n>30
|
|
|
T/F:
If a mode does exist in a data set, then the mode of the discrete random variable is one of the outcomes |
True
|
|
|
T/F:
The mean of a discrete random variable must be an outcome |
False - The mean is just the weighted average of all values
|
|
|
T/F: Discrete random variables can take on an infinite number of values
|
False. They can only take on a finite number of values
|
|
|
T/F: The standard deviation of a discrete random variable must be an outcome
|
False. Only depects the spread of the outcomes
|
|
|
The Central limit theorem states that for a discrete random variable, as the sample size is increased, the average of the observed values should steadily approach what value?
|
The true mean. The center stays the same, but the spread (stdev) decreases
|
|
|
The central limit theorem describes the ______ distribution of _______ in all samples of the same size from the same population.
a) sampling; parameters b) population; parameters c) sampling; statistics d) population; statistics e) sample; parameters |
C) Sampling; statistics.
|
|
|
What affects the mean of the sampling distribution of the sample mean?
|
The population mean
|
|
|
Is the number of books in a student's dorm a continuous random variable?
|
No - it is a discrete (countable) random variable
|
|
|
______ uses sample evidence to validate or invalidate a claim regarding a population
|
Hypothesis testing
|
|
|
A set of data values observed at successive points in time is known as,
|
Time series
|
|
|
One of more data values observed at a fixed time is known as,
|
cross sectional
|
|
|
When computing the stdev of the sample mean, the finite population correction factor is used when,
|
The sampel is selected without replacement and the sample size is greater than 5% of the population
|
|
|
The central limit theorem is a statistical/mathematical theorem used to describe,
|
the distribution of the sample mean
|
|
|
Suppose we wish to estimate a population value but we have no claim as to what we believe that population value to be. Under these circumstances, we would use what statistical methodology?
|
Estimation
|
|
|
what affects the standard deviation of the sampling distribution of the sample mean?
|
n (sample size) and stdev of population
|
