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AP Statistics Long Review
AP Statistics Long Review
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AP stat exam prep... General Review
Flashcards
36 cards
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Practice quiz
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Questions
36
Answers
1
Rymy tips $2 and 20% of his meal. Meals have the M 9 and SD 3. What is the M and SD of his tips
$3.8, $0.6
$9.8, $0.3
$3.8, $3
$2, $1.8
2
You measure age, height and ice cream preference. The number and type of variables are
3; two quantitative and one categorical
3; two categorical and one quantitative
2; two quantitive
3; two numbered and one open
3
Quinn samples every 3rd person who leaves the room. Will this result in a simple random sample?
Yes, because everyone has the same chance of being selected
No, not every possible sample has a chance of being selected
Yes, this is systematic sampling and will make a special SRS
Yes, if everyone walks out the same door
4
What is the median number of lizards for a zoo?
36
32
37
3.7
5
If A and B are independent then they cannot be mutually exclusive
Can't tell
False
True
6
What is the standard score/ Z-Score?
Parameter
number of standard deviations away from the mean
Shows the standard deviation
Test Statistic
7
Kiara hits the bull's eye 70%. What's the prb that her first bull's eye happens on her 3 throw?
.7
.233
.063
.13
8
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
9
Approximately what is point C's residual (bottom left point)?
11, it's an underestimate
11, it's an overestimate
-11, it's an underestimate
-11, it's an overestimate
10
Black bear weights are approximately normal with a mean of 250 and SD of 50. P (X > 325)?
.853
.933
.067
.057
11
This method prevents under-coverage
Stratified sampling
Randomized Design
SRS
Cluster Sampling
12
How would you describe this boxplot
There isn't enough information to infer the shape
Right skewed
Approximately normal
Left skewed
13
For a strongly right skewed distribution Elior would use which measures of center and spread
Mean and standard deciation
Median and Interquartile range
Mean and interquartile range
Median and Range
14
When asked to describe a distribution mention
mean, IQR, normality/skewness
Shape, outliers, center, spread
The type (histogram, bell curve, box plot, etc.)
The shape and any obvious outliers
15
A 52 card deck has 12 face cards. What is the prb of drawing 3 cards and getting 3 face cards?
0.5%
0.01%
1%
0.1%
16
RVs X and Y are independent. SD(X)=3 and SD(Y)=4. What is SD(Y-X)?
sqrt(16+9)
-1
Sqrt(16-9)
1
17
Which of the following statements abt Correlation is NOT true?
If r =0 there is no relationship between the variables
Outliers can dramatically effect the r
If r=0, there is no LINEAR relationship btwn the variables
A r of -.87 shows a stronger linear relationship than .7
18
What is boxed in red
Standard Error
Slope
R squared
Y intercept
19
Finn's exprmnt to see the effects of cocoa on school testing gender is blocked. Whats this mean
There will be a equal amount of boys and girls in each group
Gender is not important to the survey
Both genders perform the same
Everyone will be the same gender; no gender variation
20
50% of houses have a puppy and 40% have a kitty. 20% of houses have both. What % have neither?
25%
20%
30%
10%
21
What is the standard error based on the computer output
3.241
.02325
.511
12.22
22
SAT math scores are normal with a mean at 516 and SD of 115. How many kids scored above a 650?
12%
24%
10%
15%
23
What shape is the histogram
Approximately normal
Left skewed
Uniform
Bi-modal
24
3 lunch tables are randomly sampled in a cafeteria where grade levels are all mixed
Blocking
Simple random sample
Stratified sample
Cluster saple
25
What is the probability that someone who doesn't like skateboards will like snowmobiles?
.647
.286
.238
.714
26
In a normal distribution how much of the data falls within 2 standard deviations of the mean
99.7%
95%
68%
65%
27
P(snow)=.4, P(school close)=.3, P(both)=.2. What is P(school close GIVEN snow)?
0.286
0.5
0.75
0.2
28
Which residual is the largest
A
B
D
E
29
SAT math scores are normal with a mean 516 and SD 115. What score would be at the 65 percentile
572
631
561
560
30
What is the probability that someone who doesn't like skateboards will like snowmobiles?
.714
.238
.286
.647
31
What was the purpose of the goldfish activity?
Central limit theorem
Confidence intervals for proportions
Regression and correlation
Comparing two proportions
32
Which of the following numbers is/are outliers 0, 3, 3, 3, 4, 5, 5, 6, 7, 7, 12, 14,
12 and 14
14 only
none
12, 14, and 0
33
What is your teacher's middle initial?
C
S
M
E
34
For a variable to have a geometric distribution what condition has to be met?
All outcomes are equally likely
The probability of success has to be the same for each trial
Trials are independent
The number of trials is fixed
35
A school with 15 classes of 24 picks 2 kids from each class with random digits. Random sample?
No, not all kids had the same chance of being chosen.
Yes, because the numbers were assigned randomly to the kids.
Yes, because each kid had the same chance of being chosen.
No, because not all possible groups can be chosen.
36
Calculate a Z score for David who can lift 140lb when the average is 100lb with SD of 25lb
1.25
1.5
1.6
2
