stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Statistics Fall Final Exam Review Flashcards | StudBud
Explore
/
Statistics Fall Final Exam Review
Statistics Fall Final Exam Review
21 terms
·
StudBud Administration
·
53 plays
Imported from external platform
Flashcards
21 cards
F
Practice quiz
P
Host live
L
Questions
21
Answers
1
In a survey concerning state aid to a particular city, every 50th person registered as a voter was interviewed
cluster sampling
simple random sampling
stratified sampling
systematic sampling
2
Which of the following statements is false?
A histogram can be made using either frequencies or relative frequencies
A stemplot can be thought of as a histogram where you actually see the data
Boxplots and histograms do not retain the actual observations.
A boxplot is an effective way to graph categorical data.
3
You've drawn a simple random sample from a population. The standard deviation of this sample is a ...
parameter
statistics
variance
variable
4
A treatment will produce some kind of a response from an experimental unit. A treatment used to control for this is
response
factor
regression
placebo
5
The probability that a driver has
no
traffic violations in the last 12 months if he/she is 18 years old or older is
0.45
0.75
0.60
0.66
6
What is the correlation coefficient?
-0.7477
0.5591
0.7477
0.5189
7
The point marked A is an influential point. If you removed point A and computed a new regression equation, which is true
The correlation would be stronger and the slope would be closer to 1
The correlation would be weaker and the slope would be closer to -1
The correlation would be stronger and the slope would be closer to -1
Both the correlation and the slope would be closer to 0
8
The mean GPA for these students is ...
0.867
3.6
2.94
2.8
9
What is the equation of the least squares regression line?
y = -0.72x + 0.22
y = 1.69x + 12.39
y = 12.39 - 0.72x
y = 12.39x - 0.72
10
What is the probability that a randomly selected driver is under 18 years old or has exactly one violation?
0.26
0.54
0.12
0.66
11
Which of the following statistics is a resistant measure?
IQR
variance
coefficient of determination
slope of the LSRL
12
Which of these characteristics would be considered a categorical (or qualitative) variable?
weight of an apple
grade level of students
the number of blue automobiles in the parking lot
time required to complete the Boston Marathon
13
The median is the measure of center commonly used for income distributions because:
income distributions generally are bimodal
income distributions generally are symmetrical
income distributions are strongly skewed
income distributions generally have unequal class intervals
14
College GPA = -.29 + .98(High School GPA). What is the residual for the point (3.1, 2.8)?
0.052
2.748
-0.052
2.8
15
Suppose P(C) = .4 and P(D|C) = .2, then P(C and D) equals:
0.6
0.56
none of these
0.08
16
Look at this boxplot. What can you tell about the data set it comes from?
The mean is larger than the median
This data is approximately symmetrical
The median is 45
This data is skewed to the left
17
If P(L) = .5, P(M) = .2, and events L and M are independent, then the joint probability P(L or M) equals
0.1
0.7
0.3
0.6
18
"Do you favor the death penalty for murder?" A legitimate assignment of probabilities for this sample space is
0.4, 0.3, 0.2
0.5, -0.3, 0.2
0.5, 0.1, 0.4
0.3, 0.3, 0.3
19
A and B have identical population means. A has a greater population standard deviation than B. Which curve is taller?
Curve B is taller because its median is greater.
Curve A is taller because it has fewer inflection points.
Curve B is taller because smaller standard deviations produce thinner curve
Curve A is taller because smaller standard deviations produce wider curves.
20
Which of the following statements is true of the histogram shown here?
The mean is greater than the median
The graph is skewed right
The median is greater than the mean
The data is bivariate
21
The proportion of variation explained by a linear relationship between
x
and
y
is the
slope of the LSRL
coefficient of determination
population parameter
correlation coefficient
