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Duplicate of Ap Statistics Review CBCS
Duplicate of Ap Statistics Review CBCS
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A coalition of frisky and fun statistics questions
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Answers
1
The state administers a new test to all juniors from 15 randomly selected schools. This is a
Stratified sample of juniors from the state
Matched pairs design
Cluster sample of juniors from the state
Random sample of juniors
2
What is the standard score/ Z-Score?
Shows the standard deviation
number of standard deviations away from the mean
Test Statistic
Parameter
3
What is the average number of lizards for a zoo?
37
32
36
3.7
4
Sat math scores are normal with a mean 516 and SD 115. What score would be at the 65 percentile
561
631
572
560
5
Which of the following statements about Correlation is NOT true?
A change in the units of the variable changes correlation
An r of -.87 shows a stronger linear relationship than .7
If r is 0, there is no relationship between the variables
Outliers can dramatically affect the correlation
6
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%
7
Which of the following numbers is/are outliers 0, 3, 3, 3, 4, 5, 5, 6, 7, 7, 12, 14,
14 only
12 and 14
12, 14, and 0
none
8
A school with 15 classes of 24 picks 2 kids from each class randomly. Is this an SRS?
No, not all kids had the same chance of being chosen.
No, because not all possible groups can be chosen.
Yes, because the numbers were assigned randomly to the kids.
Yes, because each kid had the same chance of being chosen.
9
What shape is the histogram
Approximately normal
Left skewed
Bi-modal
Uniform
10
Approximately what is point C's residual (bottom left point)?
-11
-5
11
20
11
How would you describe this boxplot
Approximately normal
There isn't enough information to infer the shape
Left skewed
Right skewed
12
What is boxed in red
Standard Error
Slope
R squared
Y intercept
13
A normal distribution has a mean of 30 and SD of 2.5. What value lies at the 97.5 percentile?
36
37.5
35
32.5
14
Quinn samples every 3rd person who leaves the room. Will this result in a simple random sample?
Yes, this is systematic sampling and will make a special SRS
No, not every possible sample has a chance of being selected
Yes, because everyone has the same chance of being selected
Yes, if everyone walks out the same door
15
You measure age, height and ice cream preference. The number and type of variables you have are
3; two numbered and one open
3; two categorical and one quantitative
2; two quantitive
3; two quantitative and one categorical
16
Calculate a Z score for a player who can lift 140lb when the average is 100lb with SD of 25lb
1.5
1.25
2
1.6
17
Which residual is the largest
B
E
D
A
18
When asked to describe a distribution mention
The shape and any obvious outliers
Shape, outliers, center, spread
mean, IQR, normality/skewness
The type (histogram, bell curve, box plot, etc.)
19
What is the standard error based on the Minitab Output
.0232
.511
3.241
12.22
20
In a normal distribution how much of the data falls within 2 standard deviations of the mean
95%
99.7%
65%
68%
21
For a strongly right skewed distribution you would use which measures of center and spread
Mean and standard deciation
Median and Interquartile range
Mean and interquartile range
Median and Range
