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AP Statistics Unit 7 Flashcards | StudBud
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AP Statistics Unit 7
AP Statistics Unit 7
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Questions
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Answers
1
Zc stands for my confidence level
True
False
2
What is the first major step of the significance test?
Write your hypothesis.
Write your calculator steps.
Compare p-value with alpha value.
No first step. Leave the entire problem blank on your exam.
3
If the mean of period 2 exit ticket scores is 8, & the mean of period 4 exit ticket scores is 10, what are they summed?
4
32
9
12
4
If my p value is lower than my alpha value, I must
Fail to reject my null hypothesis
Reject my null hypothesis
Check my work, because I must have done something wrong
Conclude that a determination can not be made
5
The probability of an event happening must be between 0 and 1.
False
True
6
I must always write the steps for a significance test on my paper regardless of the section of the test I'm on.
False
True
7
If I fail to reject a false null hypothesis on my significance test, I have committed a
Type 2 Error
Type 1 Error
Type 1 & 2 Error
No error! I did it perfect!
8
I'm calculating the probability that my statistics kids will come to school based on attendance data. My pvalue can't be
0.7
1
0.3
2.005
9
If my Ho is failing a student that does poorly, and I fail to do this and end up passing the student, what is my power?
Discarding the entire statistic
Leaving their grade as it is
Changing their grade so that they fail
Improving my grading skills to catch the type II error next time
10
Which of the following is more likely to be an expected value of tickets issued by an officer than an observed value?
5 tickets
8 tickets
3 tickets
7.7 tickets
11
To set up a confidence interval, which setup is sufficient?
Both red and blue
u - ME < u < u + ME
u +/- ME
u - ME > u < u + ME
12
In a bird population, 90% of them successfully migrate. In a sample of 30, 86% do. What significance test do I need?
Two sample proportion
One sample proportion
Two sample mean
One sample mean
13
If my margin of error is 20 and my p value is 14, what is my confidence interval?
20 < u < 34
14 < u < 20
6 < u < 34
34 < u < 6
14
If my alternative hypothesis includes the symbol "not equal to", and my alpha value is 0.05, I must multiply it by 2.
True
False
15
It is highly unlikely that a significance test will appear on your free response section of the AP Exam.
True
False
16
Which of the following significance tests have we learned to perform on the calculator?
One sample proportion
One sample mean
Both blue and yellow
Two sample mean
17
Which of the following is the critical value at the 90% confidence interval?
2.005
1.465
None of the above
2.575
18
If I fail to reject the null hypothesis, I can conclude that my test has...
A type II error
Statistical Insignificance
A type I error
Statistical Significance
19
Which of the following tests work best when comparing categorical data?
Two sample proportion
Two sample mean
None of the above
Chi squared test
20
When using reverse operations to solve for my sample size, & I calculate my sample size as being 37.2, what is my answer
38
40
37.2
37
21
Which of the following is our "action" hypothesis
Null
Both
Alternative
Neither
22
Which of the following sets of statistics has the largest set of samples
12, 30, 33, 41,
18, 19, 28, 50
33, 40, 41, 44
16, 18, 18, 24
23
In a significance test, Naja & Jesse get 6.6 x e-3 as their p-value. Naja rejects Ho, Jesse doesn't. Who's right?
Naja
Jesse
Neither of them, there's no way they could come to different conclusions
With a reasonable explanation, both answers could be right
24
Which of the following alpha values coincides with the strictest requirements for a sample's error?
a = 0.05
a = 0.01
a = 0.1
a = 0.5
25
Which of the following shows the correct steps for performing a chi squared test?
2nd matrix, edit, [A] enter data, clear data, 2nd quit, stat, tests, t-test
2nd matrix, edit, [A] enter data, 2nd quit, stat, tests, x^2 test, calc
Stat, tests, x^2 test, calc
Stat, tests, t-test, stats, calc
26
Which of the following is a type I error for: Ho - not earning a winning score, Ha - earning a winning score?
They were not given a winning score but they should've been.
They were not given a winning score, and they didn't earn it.
They were given a winning score when they didn't deserve it.
They were given a winning score, and they earned it
27
If my sample sizes are 10 and 20, what is my degrees of freedom?
10
9
15
19
28
3.9 x 10^-4 is a higher p value than 2.9 x 10^-3
False
True
29
Which of the following defines my type II error?
Rejecting a false null
Failing to reject a false null
Failing to accept a true null
Accepting a true null
30
If I am not provided with an alpha value, my go to alpha value is 0.05!
False
True
