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AP Stats final review Flashcards | StudBud
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AP Stats final review
AP Stats final review
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Answers
1
look at the picture
2.91 strands
1.55 strands
2.04 strands
1.82 strands
2
Which of the following statements about the slope of the least-squares regression line is true?
When the x-variable is 0, this is what the y-variable is predicted to be.
It is unitless
It has the same sign as the correlation coefficient r.
The square of the slope equals the proportion of variation
3
Y= the number of siblings a randomly selected student has. Find the mean of Y
2.35
3.01
2.78
1.76
4
correlation
unchanged; equal to 0.89
slightly larger than 0.89
much smaller than 0.89
slightly smaller than 0.89
5
What percent of the students said that they would prefer a Nobel Prize?
the median and IQR or range
the mean and IQR or range
the mean and standard deviation
the median and standard deivation
6
According to the model, the slope can be interpreted as:
They drove 61.93 miles total.
They drove at a speed of 61.93 miles per hour.
They drove 61.93 hours total.
After 0 hours of driving, they went 61.93 miles.
7
Approximately what proportion of batteries will last 250 hours or more?
55%
35%
68%
90%
8
probability
.67
.44
.60
.75
9
Predict the distance form the pipe to the nearest fish for a temperature of 26 degrees
80.42 m
72.12 m
75.86 m
83.83 m
10
What percent of the students said that they would prefer a Nobel Prize?
43%
41.5%
83%
40%
11
percent
3.82%
4.09%
2.27%
3.82%
12
How many outliers are shown in these distributions?
2
0
1
3
13
probability
.38
.42
.67
.75
14
Below is a dotplot of the literacy rates the lowest literacy rate was 23.6%, the mean of this distribution is....
impossible to tell
clearly less than the median
very close to the median
clearly greater than the median
15
probability
.625
.489
.518
.425
16
A restaurants pizzas sell for these prices. In the table find the linear regression equation of the data.
y-hat = -8x + 0.67
y-hat = 12x + 1.5
y-hat = 0.67x - 8
y-hat- 1.5x + 12
17
probability
.457
.414
.654
.398
18
What battery life would be needed so that the battery was at the 40th percentile?
260 hours
225 hours
310 hours
330 hours
19
The overall shape of this distribution is
Right Skewed
Uniform
Left Skewed
ROughly Symmetrical
20
Using the table and summary statistics, what is the residual when the poverty rate is 16.2?
-2.27
3.34
0.92
-2.54
21
400 laps recorded with a normal distribution with a mean of 1.78 and SD of .11. What % lap times took more than 2 min?
5.6%
4.5%
3.4%
2.3%
22
z-score
5.44
3.91
3.15
3.88
23
The stem plot shows the number of wins for each of the 30 MLB teams. What percentile are the Astros in with 70 wins?
19th
26th
30th
23rd
24
Which of the following is an example of continuous variable
the number you roll on a six sided die
the amount of pennies you have in your pocket
the weight of a bag of oranges
the number of people that visits the white house in a month
25
What is the z -score for a value that is 5.5 and has a mean of 7.2 and a standard deviation of 1.4?
1.21
-2.5
2.5
-1.21
26
Here is a census of US residents 2000. If we added the variable of Social Security what kind of variable would that be?
Categorical
Neither
Quantitative
Impossible to say
27
probability
8/16
9/16
7/16
10/16
28
A group of 78 students y school took a test that measured how they felt about themselves what was the range?
46 points
52 points
58 points
64 points
29
probability
.598
.691
.724
.655
30
analyze the graph
This regression equation would overestimate the Puzzle Completion Time
There is a non-linear relationship Practice Time & Puzzle Completion Time.
ehh cant tell
There is a nonrelationship between Practice Time and Puzzle Completion Time
31
There are 9 applying for three positions: hostess, server, and busser. How many ways can these positions can be filled?
720
369
442
504
32
probability
.95
.05
1
.21
33
probability
.02
.10
.05
.04
