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Probability and Statistics Midterm Review Flashcards | StudBud
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Probability and Statistics Midterm Review
Probability and Statistics Midterm Review
50 terms
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Populations, Samples, and Statistics
Flashcards
50 cards
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Questions
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Answers
1
A survey of 30 students determined 15% planned for college.
sample statistic
population parameter
2
What is the interquartile range of the data?
10
4
1
3
3
A study of teacher salaries in South Carolina
observational
experimental
4
What is the minimum of the data?
8
12
2
4
5
An ogive is also called a bar graph.
True
False
6
The standard deviation represents how far the data value is from the mean.
False
True
7
temperatures in columbia
ratio
interval
nominal
ordinal
8
Which should be used to display data over time?
circle graph
pareto chart
bar graph
time series
9
What is the median of the data?
4
1
7
8
10
Which statistical measure is the highest number minus the lowest number?
Range
Mean
Median
Mode
11
The bars touch in a histogram.
False
True
12
5 out of 20 people like carrots. Estimate how many people like carrots out of 100.
50
40
25
20
13
A correlation coefficient close to -1 or 1 indicates a strong linear relationship.
True
False
14
What is the upper quartile of the data?
12
4
8
7
15
The difference of the medians of two samples is most significant if...
the boxes do not overlap at all.
the boxes are completely overlapping.
the boxes overlap just a little bit.
the boxes are different lengths.
16
The dependent variable is graphed on the y-axis.
False
True
17
What is the range of the data?
2
4
12
10
18
Which is true about the median of the two plots?
Amy's data has the larger median.
Both sets of data have the same median.
You cannot tell from these plots.
Ed's data has the larger median.
19
Which sample is a fair (representative)?
You pick people who are your friends.
You pick people that are yelling loudest.
You pick people who are tall.
You pick people by pulling their names out of a hat.
20
students in the gym
ordinal
nominal
interval
ratio
21
The measurements or observations for a variable are called
a population.
random variables.
a sample.
data.
22
Given the regression line y = 2x - 3, what is the y-intercept?
y-intercept is (-3, 0)
y-intercept is (0, -3)
y-intercept is (3, 0)
y- intercept is (0, 3)
23
Last week's attendance was 462 at homecoming.
inferential
descriptive
24
color of shirts
quantitative
qualitative
25
What does IQR stand for?
interquartile ratio
interquartile range
interquantile ratio
interquantile range
26
Box-and-whisker plots are divided into
fifths.
quarters.
halves.
thirds.
27
Which is true about the spread of the data values in the two plots?
They both have the same spread.
Amy's data has a larger spread.
You cannot tell from the plot.
Ed's data has a larger spread.
28
The weight of apples in a basket
continuous
discrete
29
34% of juniors have a study hall.
population parameter
sample statistic
30
Given the regression line y = 2x - 3, what is the slope?
m = -2
m = 3
m = -3
m = 2
31
I saw 12 birds and 3 of them were blue jays.
observational
experimental
32
People or objects included in a study are called
populations.
samplings.
variables.
individuals.
33
The bars touch in a bar graph.
True
False
34
Which describes a histogram with the tallest bars on the right and a long tail on the left?
skewed right
skewed left
uniform
symmetric
35
weight of book bags
qualitative
quantitative
36
GPA of all freshmen
sample
population
37
The number of pages in the textbook
discrete
continuous
38
Multiply by 180° to find the sections measurements in a pie graph.
False
True
39
If the data has no repeated values, then the mode is 0.
True
False
40
Chances of winning the lottery are 1 in twenty-two million.
descriptive
inferential
41
It is predicted that there will be 14 accidents today.
descriptive
inferential
42
Which is not used in a box-and-whisker plot?
lower quartile
median
maximum
mean
43
A pareto chart arranges data in order from smallest to largest.
False
True
44
At a factory, every 130th worker is searched.
cluster
systematic
random
stratified
45
What is the maximum of the data?
4
2
12
8
46
What is the lower quartile of the data?
7
12
4
8
47
Which statistical measure is the number that appears the most?
Range
Mean
Median
Mode
48
Which statistical measure is the middle number when ordered?
range
mode
median
mean
49
Which statistical measure is the average?
Mode
Median
Range
Mean
50
random selection of 20 student scores
population
sample
