Descriptive Statistics for Data Science

Beschreibung

A Basic quiz on Descriptive Statistics for Data Science.
Vishakha Achmare
Quiz von Vishakha Achmare, aktualisiert more than 1 year ago
Vishakha Achmare
Erstellt von Vishakha Achmare vor mehr als 3 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
In Descriptive statistics, you are describing, presenting, summarizing, and organizing your data, either through ______________.
Antworten
  • Numerical Calculations
  • Graphs
  • Tables
  • All of them

Frage 2

Frage
Which of the following is a Measure of Central Tendency?
Antworten
  • Mean
  • Median
  • Mode
  • All of them

Frage 3

Frage
Which of the following is less affected by outliers?
Antworten
  • Mean
  • Median
  • Mode
  • None of them

Frage 4

Frage
Which of the following is not affected by outliers?
Antworten
  • Mean
  • Median
  • Mode
  • None of them

Frage 5

Frage
Which of the following is a Measure of Variability?
Antworten
  • Range & Interquartile range
  • Variance
  • Standard Deviation
  • All of them

Frage 6

Frage
The bigger the range of data the more ________it is?
Antworten
  • Distributed
  • Undistributed
  • Left Skewed
  • RIght Skewed

Frage 7

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Interquartile range (IQR) is the difference between _______.
Antworten
  • Q1 - Q3
  • Q2 - Q3
  • Q3 - Q1
  • None of them

Frage 8

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Range Measures_____________of the datapoint?
Antworten
  • Beginning
  • End
  • Beginning and End
  • IQR

Frage 9

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The interquartile range (IQR) is a Measure of data where___________.
Antworten
  • Fewer values lie
  • The majority of values lie

Frage 10

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Variance is the Average of______________from the mean.
Antworten
  • Squared deviation
  • Square root of deviation

Frage 11

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Standard deviation is _____________.
Antworten
  • Square root of Variance
  • Square of Variance

Frage 12

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When you have a low Standard deviation, your data points tend to be _________ the mean.
Antworten
  • Far from
  • Close to

Frage 13

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When you have a high standard deviation, your data points tend to be ________ the mean.
Antworten
  • Far from
  • Close to

Frage 14

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Normal Distribution is _____________.
Antworten
  • Bell shaped
  • Left Skewed
  • RIght Skewed
  • None

Frage 15

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Z-Score is used to check how many standard deviations away from the mean, a _________________lies.
Antworten
  • Distribution of entire data
  • Specific data point in a data

Frage 16

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Which of the following are the Terminologies of Probability?
Antworten
  • Event, Outcome
  • Experiment, Probability
  • All of them
  • None of them

Frage 17

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Bernoulli Trials have _________ outcomes.
Antworten
  • Exactly one
  • Exactly two
  • Exactly three
  • Exactly four

Frage 18

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The Binomial distribution is the Probability distribution of the number of successes in _________Bernoulli trials.
Antworten
  • one
  • two
  • three
  • n

Frage 19

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Probability Density Function is the Probability distribution of a ____________ random variable.
Antworten
  • Continuous random variable
  • Discrete random variable

Frage 20

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The area under a probability density function gives the probability for the __________ variable to be in that range.
Antworten
  • Continuous random
  • Discrete random

Frage 21

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Taking __________ samples of equal size from the data, the sample means are approximately normally distributed.
Antworten
  • Random
  • Cluster
  • Stratified
  • Systematic

Frage 22

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In a normal distribution the ________________.
Antworten
  • Mean > Median > Mode
  • Mean = Median < Mode
  • Mean = Median = Mode
  • Mean < Median < Mode

Frage 23

Frage
Normal distribution with a mean _____ and a standard deviation of ____ is called a Standard Normal Distribution.
Antworten
  • 1,0
  • 0,1
  • 0,0
  • None of them

Frage 24

Frage
Central Limit Theorem states that: If we take means of random samples from a distribution and we plot the means, the graph approaches to a ___________distribution when we have taken a sufficiently large number of such samples.
Antworten
  • Left Skewed
  • Right Skewed
  • Normal
  • None of them

Frage 25

Frage
The Central Limit Theorem also states that the mean of __________ means is approximately equal to the mean of __________means.
Antworten
  • Population, Sample
  • Population
  • Sample
  • None

Frage 26

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A positive Z score indicates that the observed value is Z standard deviations __________ mean. A negative Z score indicates the observed value is Z standard deviations ____________ mean.
Antworten
  • Below, Above
  • Below
  • Above, Below
  • Above

Frage 27

Frage
______% of data lies within 1 standard deviation of the mean ______% of data lies within 2 standard deviations of the mean ______% of data lies within 3 standard deviations of the mean
Antworten
  • 68.27% 99.73% 95.45%
  • 68.27% 95.45% 99.73%
  • 99.73% 95.45% 68.27%
  • 68.27% 95.45% 99.73%
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