Organizing Data
Data Relationships
Producing Data & Experiments
Probability & Distributions
Inference & Tests
100
Standard deviation squared.
What is the variance?
100
observed y - predicted y
What is the residual?
100
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
100
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
100
The type of significance test used for the mean of a single population.
What is a T test (or T procedure)?
200
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
200
Measures the direction and strength of a linear relationship between two quantitative variables.
What is correlation (or r)?
200
The fact that the data will change from sample to sample is called this.
What is sampling variability?
200
The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.
What is a continuous random variable?
200
The formula to calculate the one-sample z statistic.
What is
z=(barx-mu_0)/sqrt(n)
300
These four things must be included in the description of the distribution of quantitative data.
What are shape, center, spread and outliers?
300
Outliers on a scatterplot that affect the slope of the regression line.
What are influential points?
300
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
300
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
300
This type of error could be committed when the decision is made to fail to reject the null hypothesis.
What is a Type II error?
400
When a distribution is skewed to the right, this measure of center will be higher.
What is the mean?
400
Using a regression model to make predictions about future values
What is extrapolation?
400
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
400
The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.
What is 'the sample is less than10% of the population'?
400
Two of the conditions to be verified for inference about a proportion.
What are (1) the sample size must be less than 10% of the population; (2) Simple Random Sample; (3)
n xx hatp>=10 and n xx hatq>=10
500
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normalcdf?
500
Given the following output, this is the slope of the regression model.
What is 0.163?
500
This type of bias is present in the following example:A call-in radio shows solicits audience participation in surveys on controversial topics (affirmative action, gun control, etc.) and the resulting sample tends to overrepresent individuals who have strong opinions.
What is voluntary response bias?
500
When two events, A and B, are independent then these two probabilities are equal.
P(A) = P(A|B) OR P(B) = P(B|A)
500
The type of pvalue for which you would reject a null hypothesis.
What is a low pvalue?