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AP Stats Test sig test review Flashcards | StudBud
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AP Stats Test sig test review
AP Stats Test sig test review
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1
Where is the point estimate of a confidence interval located?
It is not in the interval but helps to calculate it
At the lower end of the interval
In the middle of the interval
At the upper end of the interval
2
A type 2 error could occur when you reject the null hypothesis.
False
True
3
Choose the answer that does NOT represent the symbol below!
Alpha
Type II error
Type I error
Significance level
4
The p-value of a statistical test is ....
The probability that the null is true
Given the null is true, it is the prob of the obs. or more extreme value
The probability that the alternative is true
Probability of the observation or one more extreme occuring
5
Increasing sample size would NOT reduce which of the following?
bias
margin of error
variability
P(Type 2 error)
6
What is the difference between parameters and statistics?
parameters are exact, statistics not
parameters and statistics are the same
parameters from the population, statistics from the sample
parameters from sample, statistics from the population
7
How long do teens typically spend brushing their teeth? (Which test/interval is best?)
One sample t interval
One sample z interval
One proportion z test
One sample t test
8
What does the P in p-value represent?
Proportion
Probability
Power
Parameter
9
We usually want statistics with...
low bias and high variability
high bias and high variability
high bias and low variability
low bias and low variability
10
Proportions use __ as a parameter and ___ test statistic. Means use ___ as a parameter and ___ test statistic.
p,z,mu,t
p,z,mu,z
p hat, p, x bar, z
p hat, z, x bar, t
11
Which formula describes Degrees of Freedom for a t-test?
n+1
n-1
m-1
n-(-1)
12
When should you reject the null hypothesis?
beta < power
alpha < power
alpha > p-value
alpha < p-value
13
When is your cumulative test?
April 30th
May 13
May 2
April 5th
14
T or F: You will be allowed to use the formula sheet?
True
False
15
Which of the following is the most important AP Exam strategy for students when writing free response answers?
Use proper grammar!
Use correct punctuation!
Write in context!
Spell correctly!
16
In statistics we calculate a confidence interval when we want to ...
Determine the alternative hypothesis
Find the sample mean
Estimate a population parameter
Find out if the null hypothesis is true
17
Which of the following is NOT a main component for a well designed experiment?
blocking
control
replication
randomization
18
What is bias?
when the entire population is surveryed
improper hypothesis testing
the failure of a sampling method to represent the population
when you receive unexpected results
19
We use a t-distribution instead of a z-distribution when.....
σ is unknown
Low sample size
μ is unknown
When performing a One Prop Z Test
20
What percent of students at your school have a Twitter account? (Which test/interval is best?)
Two sample t
One sample t
One sample z interval
One sample z test
