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AP Statistics Final Review: Anushka Gadekar Flashcards | StudBud
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AP Statistics Final Review: Anushka Gadekar
AP Statistics Final Review: Anushka Gadekar
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1
For a 1 Sample Z-Test for Population Proportion how do we check normality?
Use the 10% rule.
np>10 and n(1-p)>10 (P hat)
Use CLT (n>30)
Examine the graphs and ensure there's no extreme skewness or outliers.
2
What is a p-value?
measures the strength of evidence against a null hypothesis.
Gives us the standard deviation of the sample.
The true mean of the sample.
measures the strength of evidence against an alternative hypothesis.
3
What test do we use if we wish to estimate the true slope of _____ with a ____% confidence level?
1 sample t-int
LinReg t-int for slope
geometric distribution
2 sample z-int
4
How do we interpret the coefficient of determination?
The average error in predicting ____ is ____ using LSRL.
Measures how close the data comes to forming a straight line.
____% of values lie below the LSRL
The regression line accounts for ____% of the variation in____.
5
What happens to the margin of error if we increase the sample size?
it increases
it decreases
it stays the same
confidence level decreases
6
Which one of these is a principle of experimental design?
SRS
Random assignment
Experimental Units
Block design
7
How do you find df for chi-square test?
row x column
(row - 1)(column-1)
2-1
(row + 1)(column + 1)
8
What does it mean if two events are mutually exclusive?
They cannot happen at the same time.
They can occur at the same time.
At least on of the events will occur
One event impacts the other event.
9
What is the general multiplication rule is the events are independent?
P(A)
P(B) x P(A|B)
P(A) x P(B|A)
P(A) x P(B)
10
What does the mean of the expected values E(X) represent?
On average, the (x-var) will differ from the mean by _____.
If we perform many trials, we would expect the average (x-var) to be___.
The probability distribution of a random variable.
The average of all the values.
11
The mean is resistant to outliers
True
False
12
A negative residual is an underestimate
True
False
13
What do you call the standardized location that tells you how many standard deviations from the mean the value is?
z-score
standard deviation
IQR
percentile
14
For LINER how do you check the condition for Normal?
Look at the scatter of the residuals
Make a stemplot, histogram, or NPP
use 10% rule
examine scatterplot and residual plot
15
What does confidence level tell us?
how likely the method will produce an interval that includes the statistic
how likely the method will produce an number that includes the parameter
how likely the method will account for sampling variability
how likely the method will produce an interval that includes the parameter
