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SI 1105 - Unit 1, review to 3.4 Flashcards | StudBud
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SI 1105 - Unit 1, review to 3.4
SI 1105 - Unit 1, review to 3.4
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StudBud Administration
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Basic probability & statistics review #umsl #gotritons #SIrocks
Flashcards
31 cards
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Practice quiz
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Questions
31
Answers
1
What are we calculating here?
variance of a sample
standard deviation of a population
standard deviation of a sample
variance of a population
2
When would we use this calculation?
When grouping spans of data into classes
To create a pie chart
When determining next semester's tuition
3
For this 5 number summary, what is the median?
5
24
24.8
25
4
Normal or skewed?
Normal
Skew right
Skew left
5
4 possible outcomes. Experiment performed 600 times. What is the frequency of outcome 1?
144
516
16
It cannot be determined. Not enough information given.
6
In following study of planets, how many variables are there?
20
15
3
5
7
N or n?
n
N
8
Why are the bars touching in this graph?
Because the data is quantitative
Because the data is qualitative
Because it's not a histogram
That's how bar charts are presented
9
What's YOUR pep talk?
I can solve this.
(something else... say it out loud now!)
I'm embracing a growth mindset.
Mistakes are good. They help me learn.
10
In this histogram, what is the class midpoint for the "45-54" class?
> $40,000
49.5
24.5
50
11
4 possible outcomes. Experiment performed 600 times. What is the missing value for outcome 4?
16
It cannot be determined. Not enough information given.
96
21
12
When would you use this formula?
To determine how big the pie slice is in a pie chart
You're trying to trick me, right?
Determine percentile value
Determine percentile index
13
Following is days to maturity data for a sample of investments. Determine the histogram shape:
symmetric
skewed left
skewed both left & right
skewed right
14
What is this formula used to determine?
Standard deviation of a population
Variance of a population
Mean of a sample
How much my head hurts
15
N or n?
N
n
16
What are we finding here?
standard deviation of a sample
variance of a population
standard deviation of a population
variance of a sample
17
What type of data are we visualizing?
qualitative, so this is a bar chart
quantitative, so this is a bar chart
qualitative, so this is a histogram
quantitative, so this is a histogram
18
What part of this formula tells me we're calculating for a sample?
Σ
"n" in the denominator
"n-1" in the denominator
it's not for a sample, it's for a population!
19
If the variance is 52, what is the standard deviation?
26
7
7.211
Depends on whether variance is for a sample or a population
20
Normal or skewed
skew left
Normal
skew right
21
For this 5 number summary, are there any outliers?
Yes, 14 is an outlier
Yes, 39 is an outlier
No
Yes, both 14 & 39 are outliers
22
For this 5 number summary, what is the interquartile range of data?
24.8
25
24
5
23
For this 5 number summary, what is the range of data?
24
25
24.8
5
24
What do these symbols have in common?
represent a sample
represent a population
represent the standard deviation
represent the variance
25
Which option properly describes this statement?
C) At least 60% of observations ≥ 46
B) Exactly 40% of observations: ≤46
Both A & C
A) At least 40% of observations ≤ 46
26
What do these symbols have in common?
represent the mean
represent a population
represent a sample
represent the standard deviation
27
Given following DTM data, determine cumulative relative frequency for 60-90 class
.325
84
.718
.452
28
In following study of planets, how many observations are there?
20
3
5
15
29
Normal or skewed?
skewed left
normal
skewed right
30
You're creating a pie chart. How many degrees would sector representing "1" contain?
15
120
54
18
31
In following study of planets, how many elements are there?
20
5
3
15
