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We love statistics!
We love statistics!
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#math #statistics
Flashcards
32 cards
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Practice quiz
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Questions
32
Answers
1
Is this a bijective function?
True
False
2
What is the type of variable a?
A list
A set
An error
A dictionary
3
What requirements are necessary for a normal pdf to be a standard normal pdf?
Mean and standard deviation must be 1 and 0 respectively.
Mean and standard deviation must be divided by gamma.
Mean and standard deviation must be 0 and 1 respectively.
Mean and standard deviation must be divided by sigma.
4
What does the code snippet do given that 'population' is a dataframe with 4 columns and 5 rows?
Nothing. It will return an error
Cast all the items of the df to strings
Cast only the items in the 1st row of the df to strings
Cast only the items in the 1st column of the df to strings
5
What is Pau’s ringtone?
The macarena
The game of thrones theme song
Barbie girl
Ice Ice Baby
6
What is the sum of probabilities of all the events in omega?
∞
It depends
1
-1
7
You are most likely to die in an accident as the following:
Motorcyclist
Pedestrian
Passenger
Driver
8
What is the z-score for a 95% confidence interval?
1.96
1.645
2.576
1.28
9
What is the cardinal of { 1, 2, 3, 4, ... } ?
2
4
3
∞
10
What is the cardinal of { 1 , 2 , 3 , 4 } ?
3
4
2
∞
11
What will this code snippet return?
A dataframe
A modified series
An error
12
Which statistics can you observe in a box plot?
Minimum, maximum and median.
Minimum, maximum, mean, first quartile and third quartile.
Minimum, maximum and mean.
Minimum, maximum, median, first quartile and third quartile.
13
What is the upper limit of a cumulative distribution function?
1
∞
0
-1
14
What % of the data falls ± 2 standard deviations from the mean in a normal distribution?
90%
80%
85%
95%
15
Where is the ice melting?
Arctic
Antarctic
Ice cream shop
Ironhack's freezer
16
What does the p-value mean?
Answer 3
Answer 2
Answer 4
Answer 1
17
If you move from a one-tailed test to a two-tailed test:
You are less likely to reject the Ho
You must divide the p-value by 2
You are more likely to reject the Ho
You know if the mean is less than proposed in your Ho
18
Kelsey and Eva expect a student to come annoy them with a question once every 2 minutes.
Poisson
Binomial
Normal
You cannot determine from this information
19
Type I Error
Wrong interpretation of a rejected null hypothesis
Failing to reject the null when the alternative is true
Random error (noise)
Rejecting the null when it is actually true
20
Is the probability function independent from the x taken?
It depends
No
Yes
21
Census data from a city of 150,000 residents produced the income distribution shown here:
Skewed to the left
Unknown
Approximately normal
Skewed to the right
22
What is the sum of probabilities of all the events in the sigma algebra?
It depends
-1
1
∞
23
Given two numpy 3d-arrays with the same size, can we add them?
Yes
It depends
No
24
Is this a bijective function?
False
True
25
What is everyone’s favorite subject?
STATISTICS!
SQL
Python
Beer
26
What is the covariance of a normal distribution with N(1, 0) ?
1
0
∞
27
Is the following slicing technique right?
True
False
28
In 2017, is the number of rocket launches of China greater than the number of Other?
It is greater
I won't waste my time looking at this graph.
It is lower
29
What is the output of the following code?
An empty string
All the consonants and special characters in the text
An error
All the vowels in the text
30
Can the points of the dispersion diagram always be modeled with a function?
It depends
No
Yes
31
SQL: Select all records from the "b" table where items in column "c" start with "a".
SELECT * FROM b WHERE c = '%a%'
SELECT * FROM b WHERE c = '%a'
SELECT * FROM b WHERE c = 'a%'
SELECT * FROM b WHERE c = 'a'
32
Is this a bijective function?
False
True
