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SI 1105 - Unit 1, review to 3.2 Flashcards | StudBud
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SI 1105 - Unit 1, review to 3.2
SI 1105 - Unit 1, review to 3.2
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StudBud Administration
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Basic probability & statistics review #umsl #gotritons #SIrocks
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Normal or skewed?
skewed right
normal
skewed left
2
You're creating a pie chart. How many degrees would sector representing "1" contain?
120
54
18
15
3
N or n?
N
n
4
If the variance is 52, what is the standard deviation?
7
Depends on whether variance is for a sample or a population
26
7.211
5
Normal or skewed?
Skew right
Skew left
Normal
6
When would we use this calculation?
To create a pie chart
When determining next semester's tuition
When grouping spans of data into classes
7
What type of data are we visualizing?
quantitative, so this is a bar chart
quantitative, so this is a histogram
qualitative, so this is a bar chart
qualitative, so this is a histogram
8
4 possible outcomes. Experiment performed 600 times. What is the frequency of outcome 1?
516
144
16
It cannot be determined. Not enough information given.
9
In following study of planets, how many elements are there?
20
3
5
15
10
When would you use this formula?
Determine percentile value
To determine how big the pie slice is in a pie chart
Determine percentile index
You're trying to trick me, right?
11
Why are the bars touching in this graph?
Because the data is qualitative
Because the data is quantitative
That's how bar charts are presented
Because it's not a histogram
12
What do these symbols have in common?
represent the mean
represent a population
represent a sample
represent the standard deviation
13
What part of this formula tells me we're calculating for a sample?
"n" in the denominator
Σ
"n-1" in the denominator
it's not for a sample, it's for a population!
14
What do these symbols have in common?
represent the variance
represent a sample
represent a population
represent the standard deviation
15
In this histogram, what is the class midpoint for the "45-54" class?
50
49.5
> $40,000
24.5
16
4 possible outcomes. Experiment performed 600 times. What is the missing value for outcome 4?
21
It cannot be determined. Not enough information given.
96
16
17
Following is days to maturity data for a sample of investments. Determine the histogram shape:
skewed both left & right
skewed right
symmetric
skewed left
18
What are we finding here?
variance of a population
standard deviation of a sample
standard deviation of a population
variance of a sample
19
What is this formula used to determine?
How much my head hurts
Variance of a population
Mean of a sample
Standard deviation of a population
20
Given following DTM data, determine cumulative relative frequency for 60-90 class
.452
.718
84
.325
21
In following study of planets, how many variables are there?
5
20
15
3
22
N or n?
N
n
23
In following study of planets, how many observations are there?
3
15
5
20
24
Which option properly describes this statement?
A) At least 40% of observations ≤ 46
C) At least 60% of observations ≥ 46
Both A & C
B) Exactly 40% of observations: ≤46
25
What are we calculating here?
standard deviation of a sample
standard deviation of a population
variance of a population
variance of a sample
26
Normal or skewed
Normal
skew left
skew right
