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AP Statistics Review Flashcards | StudBud
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AP Statistics Review
AP Statistics Review
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A coalition of frisky and fun statistics questions prepare you for a five
Flashcards
34 cards
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Answers
1
When asked to describe a distribution mention
The type (histogram, bell curve, box plot, etc.)
The shape and any obvious outliers
Shape, outliers/unusual values, center, spread
mean, IQR, normality/skewness
2
For a strongly right skewed distribution Elior would use which measures of center and spread
Median and Range
Median and Interquartile range
Mean and interquartile range
Mean and standard deciation
3
What is boxed in red
Slope
Y intercept
R squared
Standard Error
4
Sy tips $2 plus 20% of his meal. Meals have the M 9 and SD 3. What is M/SD of his tips
$3.8, $0.6
$2, $1.8
$9.8, $0.3
$3.8, $3
5
Which of the following numbers is/are outliers 0, 3, 3, 3, 4, 5, 5, 6, 7, 7, 12, 14,
none
14 only
12, 14, and 0
12 and 14
6
Which residual is the largest
D
B
A
E
7
What is the standard error for the slope based on the Minitab Output
.02325
.511
12.22
3.241
8
P of snow is .4, P of school close is .3, P of BOTH is .2. What is P of school close GIVEN snow
0.75
0.5
0.286
0.2
9
Ramdog randomly picks 3 lunch tables to sample in a cafeteria where grade levels are all mixed
Blocking
Simple random sample
Stratified sample
Cluster sample
10
Kiara hits the bull's eye 70%. What's the prb that her first bull's eye happens on her 3 throw.
.13
.063
.7
.233
11
What is the probability that someone who doesn't like skateboards will like snowmobiles?
.714
.647
.286
.238
12
Joe's exprmnt to see the effects of cocoa on testing, is blocked by gender. Whats this mean?
Everyone will be the same gender; no gender variation
Gender might be a confounding variable
Gender is not important to the survey
Both genders perform the same
13
Which of the following statements about correlation is NOT true? (CC = correlation coefficient)
Outliers can dramatically effect the CC
A CC of -.87 shows a stronger linear relationship than .7
Correlation does not imply causation
If the C is 0 there is no relationship between the variables
14
The prob of blue eyes is 14%. What is the prob of at least 5 people in 20 ppl have blue eyes?
.833
.863
.087
.137
15
The state administers a new test all 11th graders from 15 randomly selected schools. This is a
Stratified sample of 11th graders from the state
Matched pairs design
Cluster sample of 11th graders from the state
Random sample of 11th graders
16
A school with 15 classes of 24 picks 2 kids from each class with random digits. Random sample?
Yes, because the numbers were assigned randomly to the kids.
No, not all kids had the same chance of being chosen.
No, because not all possible groups can be chosen.
Yes, because each kid had the same chance of being chosen.
17
SAT math scores are normal (mean at 516 and SD) of 115. What percent of kids scored above 650?
15%
10%
24%
12%
18
There are 5 outcomes to an expt that are calculated to be .34, .5, .42, 0, -.26. Conclusion?
The sum of the individual probabilities is one.
One of the outcomes will never occur
One of the outcomes will occur 50% of the time
An error was made
19
Black bear weights are approximately normal with a mean of 250 and SD of 50. P (X > 325)?
.933
.853
.067
.057
20
50% of houses have a puppy and 40% have a kitty. 20% of houses have both. What % have neither?
20%
10%
30%
25%
21
Calculate a Z score for David who can lift 140lb when the average is 100lb with SD of 25lb
1.5
1.25
2
1.6
22
(Pay attention only to table) What is the prb that the thing has at least 2 of the variable X
0.53
0.85
0.38
0.5
23
This method prevents under-coverage
Stratified sampling
Randomized Design
Cluster Sampling
SRS
24
Approximately what is point C's residual (bottom left point)?
-5
20
-11
11
25
A 52 card deck has 12 face cards. What is the prb of drawing 3 cards and getting 3 face cards?
0.01%
0.1%
0.5%
1%
26
How would you describe this boxplot
There isn't enough information to infer the shape
Right skewed
Left skewed
Approximately normal
27
How do you find the SD of the difference of two random variables X and Y is?
Use pythagorean theorem of stats
subtract the SDs
add the SDs together
the mean is pulled in the direction of the skew
28
In a normal distribution how much of the data falls within 2 standard deviations of the mean
65%
95%
99.7%
68%
29
What is the median number of lizards for a zoo?
36
32
37
3.7
30
If A and B are disjoint then they cannot be independent.
Can't tell
False
True
31
What is the standard score/ Z-Score?
number of standard deviations away from the mean
Test Statistic
Parameter
Shows the standard deviation
32
What shape is the histogram
Left skewed
Uniform
Bi-modal
Approximately normal
33
A normal distribution has a mean of 30 and SD of 2.5. What value lies at the 97.5 percentile?
35
37.5
32.5
36
34
You measure age, height and ice cream preference. The number and type of variables Ian has are
3; two quantitative and one categorical
3; two numbered and one open
2; two quantitive
3; two categorical and one quantitative
