Descriptive Statistics
What is the median of 3,5,7,9,11?
7
The probability of flipping tails on a coin flip
0.5
Type of sample gives every individual a chance of being chosen
a random sample
name of the distribution that used for large- sample confidence intervals
name of distribution used for inference about means
T distribution
The measure of spread that uses the formula
The probabilty that event A and B occurs, if they're independent
P(A) x P(B)
Type of bias occurs when an individual selected, but didn't respond
nonresponse bias
type of margin of error depend on the critical value
z* value
condition must be checked when using the t procedures
large sample size
What graph is used to show the distribution of a single variable?
a histogram
This rule used to find the probability of either A or B
the addition rule
A type of bias where the person want to be in the sample
voluntary sample
name of a test to compare one proportion to a hypothesized value
one-proportion z-test
The standard error of the mean is calculated by dividing the standard deviation
square root of N
The type of outlier lies more than 1.5xIQr above Q3 and below Q1
boxplot outlier
This rule helps us find the probability of both A and B occuring when independent
the multiplication rule
Type of variable manipulated by the researcher
explanatory variable
The success or failure conditions an expected amount of successes and failures
10 of each
The null hypothesis in two-sample t-test to the value of means
0
The value tells us the number of standard deviation by the mean
z-score
The name of a diagram to calculate the conditional probabilities
tree diagram
list where a sample is chosen
sampling frame
describes the probability of getting a result
p-value
Degrees of bfreedom for one sample t test with n=15
14