Data Collection
response bias
as the number of trials increases, the relative frequency will approach the theoretical probability
What is the Law of Large Numbers
___ = 0.341x + 0.550
What is y-hat
the population proportion
What is p-hat?
The minimum expected frequency required to do a significance test for Goodness of Fit
What is 5?
these are homogeneous between and heterogeneous within
what are clusters
P(A & B) = P(A) * P(B)
The observed value of y is greater than the expected value of y using the linear model.
What is a positive residual
the part after the +/-
What is the margin of error
The formula for degrees of freedom for a chi-square goodness of fit test
# cells - 1
neither the researcher collecting data, nor the participant know the treatment group
what is double blind
The set of all possible outcomes
What is the sample space
r * (s_y / s_x)
What is the slope of the regression line
What is 0.5?
What is 2 sample z-test for a difference of proportions
For example, segregate by gender first and then within each gender, randomly assign to treatment groups
What is randomized block experiment design
probability distribution:
1-P(x<3)
What is the probability that X is 3 or more.
If you do this, the regression formula may give poor predictions
What is extrapolate?
The conclusion you might make about the null hypothesis in a significance test if a related confidence interval at the 1-alpha confidence level contains the value zero
What is fail to reject the null hypothesis?
1-sample t test conclusion (one-way)
alpha: 0.05
t: 2.33
n: 20
What is reject the null hypothesis?
individuals in an experiment are subjected to one treatment, and then the other, and differences are compared
what are matched pairs
the square root of np(1-p)
A linear regression is completed on data regarding SAT English and SAT Math scores. The coefficient of determination was found to be 0.85....
What is the proportion of variance in the dependent variable that is explained by variation in the independent variable.
The normal condition for a confidence interval for a difference of two proportions
What is n1p1 >10, n2p2>10, n1q1 > 10, n2q2 > 10 (and say what all those numbers are)
The chi-square test statistic if the observed matrix looks like:
{{10,15}, {12, 13}}
first row : 10,15
second row: 12,13
What is {{11,14},{11,14}}
0.325