A variable that has a single numerical value, determined by chance, for each outcome of a procedure
What is a random variable?
100
A continuous random variable that has a distribution with a graph that is symmetric and bell-shaped
What is a normal distribution?
100
the summation of P(X)
What is 1?
100
n times p
What is mu?
100
P(a
What is the probability that the z score is greater than a and less than b?
200
A graph, table, or formula that gives the probability for each value of the random variable.
What is a probability distribution?
200
its values spread evenly over the range of possibilities
What is a uniform distribution?
200
the summation of (x times P(X))
What is expected value?
200
n times p times q
What is variance?
200
the total under a curve must equal this.
What is 1?
300
the average value of outcomes
What is expected value?
300
a normal probability distribution with a mean of 0 and a standard deviation of 1
What is a standard normal distribution?
300
The summation of ((x minus mu)^2 times P(X))
What is variance?
300
the square root of (n times p times q)
What is standard deviation?
300
P(z>a) is equivalent to this
What is 1-P(z<a)
400
has either a finite number of values or a countable number of values, where "countable" refers to the fact that there might be infinitely many values, but they can be associated with a counting process
What are discrete random variables?
400
the probability distribution of sample means, with all samples having the sample size n.
What is sampling distribution of the mean?
400
The square root of the summation of ((x minus mu)^2 times P(X))
What is standard deviation?
400
mu plus or minus 2 times the standard deviation
What are the maximum and minimum usual values?
400
to convert something into a z score, z=
What is (x minus mu)/SD
500
has infinitely many values, and those values can be associated with measurements on a continuous scale in such a way that there are no gaps or interruptions.
What are continuous random variables?
500
the variability of a statistic.
What is sampling variability?
500
n! divided by ((n minus x)! times x!) times p to the x times q to the (n minus x)
What is P(X) of a binomial distribution?
500
(e to the -1/2 times (((x minus mu) divided by standard deviation))squared) divided by (standard deviation times the square root of 2 pi)
What is the formula for a bell curve or normal distribution?
500
the standard deviation of a+b can be found using this equation.