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Math1342 MidTerm Review
Math1342 MidTerm Review
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This is a Review for the Midterm in this class.
Flashcards
95 cards
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Practice quiz
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Questions
95
Answers
1
What is the definition of relative frequency?
Negative Correlation
Number of events divided by the total events
The total total
A line that shows what the data is doing
2
A shirt company has 4 designs, short or long sleeves and 5 colors. How many different shirts?
9
11
20
40
3
Find the probability.
8/104
16/52
16/2704
8/52
4
Probability question
32%
31%
29%
35%
5
how many people total are in this venn diagram?
456
340
90
420
6
Which cannot be a probability?
C
A
D
B
7
What are the parameters of a regression line?
The x-intercept
The y-intercept
The correlation coefficient
The slope
8
Have these two distributions the same total percentage?
YES
NO
IT DEPENDS
MAYBE
9
What is the difference between frequency and relative frequency tables?
Relative frequency tables use decimals and percents
Trick question. There is not a difference
they are the same
frequency tables use fractions and decimals
10
Empirical Probability is...
probability that is based off educated guesses or intuition.
probability that is based off of collected data.
probability that is based off a known sample space.
11
GPA if you have an A in 4 credits, D in 2 credits, B in 3 credits and C in three credits.
1.75
2.5
3.00
2.75
12
The complement of heads is...
tails
50%
not heads
heads
13
Find the probability.
1/17
3/52
1/221
4/51
14
What is true about the probability of an event and its complement?
They are the same
Their probabilities add up to 1
Their probabilities are the same
They have the same probability
15
The complement of even is
half
smaller
odd
even
16
Calculate the relative frequency of being late
8/50
3/4
1/4
4/25
17
Pie charts are primarily used for
inferential statistics
none of the above
quantitative data
qualitative data
18
μ=85 & σ=6. If Chrissy scored an 82 on the test what is her zscore?
-2.00
-0.50
2.00
0.50
19
An empirical probability distribution is based on:
Historical Data
Scientific Principle
Theory
Logic
20
Find the probability.
3/8
3/5
3/4
1/2
21
The mean for a normal distribution:
Distance from the center.
The center of symmetrical normal curve
Doesn't exist
The length of a curve.
22
Conditional Probability
0.33
0.67
0.5
0.25
23
Which one of these is a Normal Distribution ?
A
C
D
B
24
What is the slope of the regression line defined by the output below?
0.1414
12.12
0.7513
37.0
25
Find the of mean of the following golf scores: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72
73
76
67
71
26
LINE REGRESSION
H
F
G
J
27
A normal distribution curve is __________
funny
symmetric
skewed
always purple in color.
28
What is the zscore of a student who has a height of 63 inches?
-2
1
2
-1
29
The venn diagram represents
P(A ∩ B)
P( Ac)
P(A U B)
P (not A)
30
Histograms
are graphs with no gaps between columns
are presented as line connecting dots
are like a pie
are graphs with gaps between columns
31
The "sweet spot" location of the best-fit regression line.
sum of the squared residuals is smallest
the correlation coefficient is near 1 or -1.
the sum of the residuals is zero
at least two of the data points lie on the line
32
Find the
conditional relative frequency
for male business to total business.
0.598
0.444
0.263
0.615
33
Conditional Probability Question
44%
37%
11%
22%
34
Find the probability.
1/8
2/8
2/12
1/12
35
What is the probability of the complement of A?
.3
.4
.7
.2
36
Conditional Probability
44.4%
33%
57%
26.7%
37
The regression line...
predicts the value of x for a given value of y
predicts the value of y for a given value of x
shows the regression of hairline
gives the correct answer
38
Find the probability
50%
16%
84%
68%
39
Which of the following is not true about histograms?
The heights of the bars are frequency density
The bars must be different widths
Frequency is represented by area
The bars must touch
40
Find the complement of A
0,6,7,8,9
1,2,3,4,5
0,8,9
2,4,6,8
41
What is wrong with this pie chart?
Is not flat
The percents don't add up to 100%
Wrong Colors
Names aren't inside slices
42
A standard normal distribution has:
A mean of 1 and standard deviation of 1
A mean larger than its standard deviation
All scores within 1 standard deviation of the mean
A mean of 0 and a standard deviation of 1
43
Choose the correct statement about each of thefollowing histograms
Most families have more than 9 pets
Most families have less than 9 pets
Most families have between 0 and 2 pets
All families love pets
44
Complement of an event
Probability
Probability that an event will occur
Probability that an event will occur in the future
Probability that an event will not occur
45
True or False: both histograms have the same mean and standard deviation
True
False
46
Conditional Probability
not enough info
3/4
1/2
5/6
47
The complement of blue is...
red
not blue
red or green
green
48
Find the probability.
17/104
16/52
17/52
16/104
49
The point that is always on a best-fit regression line.
point D
point B
point C
point A
50
Which of the following cannot be a probability?
B
A
C
D
51
Find the probability
1/6
1/2
1/3
2/3
52
Probability Question
13%
23%
36%
9%
53
Find the probability of having a credit card given that the student is a sophomore.
.245
.130
.325
.675
54
What does a zscore of 2.5 tell you?
It is not a piece of data in the set.
You have a piece of data that is lower than the mean.
You have the mean of the data.
You have something greater than the mean.
55
Sets
D
A
C
B
56
Conditional Probability
3/5
3/12
3/4
3/8
57
Find the range of the data: 2.0, 3.2, 1.8, 2.9, 0.9, 4.0, 3.3, 2.9, 3.6, 0.8
3.2
2.8
2.45
1.4
58
Do histograms have spaces in between each bar?
yes
no
59
The Empirical Rule
99.7%
95%
34%
68%
60
Grade tests scores are 62,83, and 91,Final 88 and HW average 76. Tests are 60%, Final 25% and HW is 15%.
80.6
76.6
90.6
85.6
61
Find the probability.
9/10
729/1000
27/1000
27/10
62
Find the sample standard deviation: 15, 42, 53, 7, 9, 12, 14, 28, 47 . Round to nearest tenth.
16.6
15.8
29.1
17.8
63
The colors of automobiles on a used car lot.
Quantitative
Qualitative
64
pie charts is use to
show improvement
show movement
compare categories
show progression
65
Find the probability.
11/32
11/16
30/16
30/256
66
For the dot plot below, what is the maximum and what is the minimum entry?
max: 34; min: 12
max: 12; min: 17
max: 43; min: 16
max: 17; min: 12
67
The complement of certain is
likely
impossible
even chance
unlikely
68
Find probability that one student cheated on exam if 800 have and 1761 said that they have not.
2561/1761
1761/2561
2561/800
800/2561
69
Find the zscore that has a percentile rank of 79.
0.81
-0.81
-0.55
0.79
70
What is conditional probability?
A probability that is only 50% correct.
A probability that talks about conditional poverty.
A probability that can only be calculated by experts.
A probability that changes depending on a condition.
71
Conditional Probability
3/5
3/4
3/12
3/8
72
Probability - Relative Frequency
Tyrone
Heather
Jose
Mai Ka
73
A poll is conducted in which profession musicians are asked their ages.
Experiment
Observational Study
74
The main advantage of box-and-whisker plots over histograms is.......
Boxplots show symmetric distributions, not skewed
Boxplots use a number summary instead of a mean and SD
Boxplots show more detail of distributions
Boxplots make it easy to compare several distributions
75
Select all statements that do not apply to normal distributions.
The area under the normal curve is equal to 1.
They are symmetric around their mean
They are defined by their mean and skew.
The mean, median, and mode are the same.
76
true or false: histograms record data in intervals
false
true
77
What does the complement rule state?
P(A) = 1 - P(not A)
P(A) = P(A) - P(B)
P(A) = P(A) × P(B)
P(A) = P(A)X + P(B)
78
Normal Distributions are NOT symmetrical
False
True
79
Determine the symmetry of the histogram
skewed right
Skewed left
symmetric
uniform
80
Probability - Relative Frequency
Mai Ka
Tyrone
Heather
Jose
81
The Empirical Rule
68%
34%
99.7%
95%
82
Find the median of golf scores in a recent tournament. 67, 67, 68, 71, 72, 72, 72, 72, 73, 76
67
73
72
71
83
Find the
conditional relative frequency
for male education to total education.
0.598
0.417
0.263
0.615
84
Find the probability
5/16
25/64
25/56
5/14
85
The number of seats in a movie theater.
Quantitative
Qualitative
86
Choose the correct statement about each of thefollowing histograms
Most people pay $14.01-$19 for lunch
Most people do not like $10 lunches
People like to eat lunch out
Most people pay more that $9 for lunch
87
Which type of data are histograms drawn from?
Survey
Continuous
Discrete
88
With HISTOGRAMS YOU CAN SEE
PERCENTS
EACH VALUE
CLUSTERS
89
The weight (in pounds) of 30 preschool children are listed below. find the five-number summary.
25, 27.5, 30.5, 33.5,38
25, 27.5, 30.75, 33, 38
25, 28, 30.75, 34, 38
25, 28,30.5,34, 38
90
LINE REGRESSION
A
C
D
B
91
Correlation or Regression
b
a
92
The least squares regression line minimizes the sum of the
Differences between actual and predicted Y values
Squared differences between actual and predicted Y values
Differences between actual and predicted x values
Absolute deviations between actual and predicted Y values
93
Regression
d
b
c
a
94
What are pie charts used for?
eating data
showing parts to a whole data
comparing two data sets
95
The normal distribution is a continuous distribution.
TRUE
False
