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SI 1105 - Unit 1, prep for quiz 2 Flashcards | StudBud
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SI 1105 - Unit 1, prep for quiz 2
SI 1105 - Unit 1, prep for quiz 2
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Basic probability & statistics review #umsl #gotritons #SIrocks
Flashcards
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Questions
21
Answers
1
What part of this formula tells me we're calculating for a sample?
Σ
"n-1" in the denominator
"n" in the denominator
it's not for a sample, it's for a population!
2
For this 5 number summary, are there any outliers?
Yes, 14 is an outlier
No
Yes, 39 is an outlier
Yes, both 14 & 39 are outliers
3
What's YOUR pep talk?
I'm embracing a growth mindset.
Mistakes are good. They help me learn.
I can solve this.
(something else... say it out loud now!)
4
What do these symbols have in common?
represent a population
represent a sample
represent the mean
represent the standard deviation
5
Which option properly describes this statement?
C) At least 60% of observations ≥ 46
A) At least 40% of observations ≤ 46
B) Exactly 40% of observations: ≤46
Both A & C
6
Which of the following statements is correct? (Hint: calculate your sample size.)
x̅ = 72, N = 33
μ = 72, n = 171,072
x̅ = 72, n = 171,072
μ = 72, N = 33
7
What is this formula used to determine?
Variance of a population
Standard deviation of a population
How much my head hurts
Mean of a sample
8
In an ordered stem & leaf display, what would the leaves be for stem 2?
650, 830, 940
6, 8, 9
600, 800, 900
651, 831, 942
9
For this 5 number summary, what is the range of data?
5
24.8
25
24
10
What are we calculating here?
Sample variance
Sample mean
Population mean
Population variance
11
N or n?
n
N
12
For this 5 number summary, what is the median?
24.8
25
24
5
13
When would we use this calculation?
When grouping spans of data into classes
None of these
To create a pie chart
When determining next semester's tuition
14
N or n?
N
n
15
If the variance is 52, what is the standard deviation?
26
Depends on whether variance is for a sample or a population
7
7.211
16
What do these symbols have in common?
represent the variance
represent a sample
represent a population
represent the standard deviation
17
What are we finding here?
standard deviation of a population
variance of a population
variance of a sample
standard deviation of a sample
18
Using the following data, create a stem & leaf display. What is the appropriate stem unit?
100
1
1000
10
19
For this 5 number summary, what is the interquartile range of data?
25
24.8
5
24
20
When would you use this formula?
Determine percentile value
To determine how big the pie slice is in a pie chart
You're trying to trick me, right?
Determine percentile index
21
What are we calculating here?
variance of a population
standard deviation of a population
standard deviation of a sample
variance of a sample
