Organizing Data
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
Significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test?
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)?
randInt(1,9,3)
What is the calculator command for generating 3 random numbers from 1 to 9?
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?
The formula to calculate the one-sample z statistic for categorical data.
What is z = (p-hat - po) divided by standard error of po?
This graphical display shows the 5-number summary.
What is boxplot?
The percent of the variation in the values of y that is explained by the LSRL of y on x.
What is the coefficient of determination (or r squared)?
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 randomized block design?
Events that have no outcomes in common and can never occur simultaneously.
What are mutually exclusive events?
A test for comparing multiple proportions across two samples.
What is the chi-square test of homogeneity?
Applying a logarithmic transformation to both variables causes this type of model to become linear.
What is a power model? or an exponential model?
A sampling procedure where you pick every nth person.
What is systematic random sample?
The condition involving the population size that must be satisfied to use the standard deviation of a sampling distribution.
What is the 10% condition (population is at least 10 times the sample size)?
The proportion variable used when checking the normal condition if calculating a confidence interval for a proportion.
What is p-hat?
This rule helps to determine if data is normally distributed by checking the number of observations within each interval from the mean.
What is 68-95-99.7? What is the Empirical Rule?
Refers to how much the actual value typically varies from the predicted value.
What is standard deviation of residuals?
The 4 basic principles of experimental design.
What are control, randomize, compare, and replicate?
The formula for finding the expected value of a geometric probability distribution.
What is 1/p?
b +/- t*SE sub b
What is the confidence interval for slope (beta) of a true regression line?