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Unit 1 -4 Statistics Overview Flashcards | StudBud
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Unit 1 -4 Statistics Overview
Unit 1 -4 Statistics Overview
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1
Describe the shape of distribution.
Uneven
Skewed Left
Symmetrical
Skewed Right
2
Quantitative or Qualitative?
Quantitative
Qualitative
3
Binomial Probability?
rCn ⋅ pr ⋅ qn-r
nCr ⋅ pr ⋅ qn-r
nCr ⋅ pn ⋅ qr-n
rCn ⋅ qr ⋅ pn-r
4
Discrete Probability Notation
Σx
μx
δ2
P(x)
5
As the confidence level increases, the confidence interval ______________ ?
doesn't change
decreases
narrows
widens
6
What is the correct formula to find a z score?
μ/σ
(x-μ)/ σ
(σ-x)/μ
(μ-σ)/x
7
Which box plot has a greater IQR?
Ray
They are the same
Ken
8
Is this discrete or continuous data?
Continuous
Discrete
9
What did you enjoy about this course?
Nothing
Group Assessments & Posters
Warm-ups
Beautiful Notes
10
For Continuous Probability Distribution, PROBABILITY = ?
0
Less Than 1
Area
Greater Than 1
11
Describe the shape of the distribution.
skewed right
none of the above
symmetric
skewed left
12
Empirical Rule
normal distribution, 68% of data falls within one standard deviation
The average must be the median
No data falls within two standard deviations
All data points must be equal
13
Confidence interval
used to estimate where proportion or means lie
how confident you are in the interval
80%, 90%, 95%. 99%
1.96 and 2.576
14
Identify the mean of the following data: 2, 4, 6, 9, 14
7
5
3
9
15
Is this discrete or continuous data?
Continuous
Discrete
16
In blackjack what value(s) does the Ace have
11
1 and 11
2
1
17
The notation "x̄" (x bar) is commonly used to represent what statistic?
Sample Standard Deviation
Population Mean
Sample Mean
Population Variance
18
Identify the mean of the data set: 1, 8, 15
3
8
1
15
19
In statistics, the shape of this distribution is described as
Modal
A camel
Bi-modal
Multi-modal
