The design of a statistical study shows this if it would consistently underestimate or consistently overestimate the value you want to know
What is bias
100
P(A∩B)
P(B∣A)= ______
P(A)
What is conditional probability
100
An SRS is taken of the sample.
What is Random condition.
100
Used to compare the distribution of a quantative variable for two groups.
What is back-to-back stemplot
100
Experimental units that are human beings.
What are subjects.
200
Measures the direction and strength of the linear relationship between two quantitive variables, usually written as r.
What is correlation
200
ṕC= Count of sucesses in both samples combines/ count of individuals in both samples combined
ṕ= p hat
What is a pooled or combined sample proportion
200
It is safe to use normal proximation for performing inference about a proportion p if np≧10 and n(1-p)≧10
What is Large Counts
200
Graph of a 5-number summary, box spans with quartiles and shows the spread of the distribution.
What is a box plot
200
A graph of quantative data with two clear peaks.
What is bimodal.
300
The distribution of one of the categorical variables in a two-way table of counts among all individuals described by the table.
What is marginal distribution
300
statistic ± (critical value) x (standard deviation of statistic)
What is confidence interval
300
When taking an SRS of size n from a population of size N, check that n is greater than or equal to 1/10N
What is 10% condition
300
Simple graph that shows each data value as a dot above its location on a number line.
What is a dot plot
300
The difference between the chi-square test for goodness of fit formula and the chi-square test for homogeneity
What is nothing
400
Occurs when we reject Ho when Ho is true.
What is Type 1 Error
400
x²= ∑(Observed-Expected)² / Expected
What is chi-squared statistic
400
In an SRS of size n from any population with mean Mu and finite standard deviation σ, when n is large, the sampling distribution of the sample mean is approximately normal
What is the CLT
400
Graph that displays the distribution of a quatative variable. The horizontal axis marked in the units of measurement for the variable. The vertical axis contains the scale of counts or percents.
What is a histogram.
400
Smallest observation, first quartile, median, third quartile, and largest observation, written in order from smallest to largest.
What is a Five-number summary
500
Family of distributions that take only nonnegative values and are skewed to the right. A particular distribution is specified by giving its degrees of freedom.
What is chi-square distribution
500
ṕ±z*√ṕ(1-ṕ)
_______
n
ṕ= p hat
What is one sample z interval for a proportion
500
For any fixed value of X, the mean response y falls on the population (true) regression line μʸ=σ+ℬx
What is Linear
500
Graph used to compare the distribution of a categorical variable in each of several groups. For each group, there is a single bar with "segments" that correspond with different values.
What is a segmented bar graph.
500
If we observe more and more repetitions of any chance process, the proportion of times that a specific outcome occurs approaches a single value, whcih we call the probability of that outcome.