Test
Descriptive Statistics for Data Science
Preguntas del test (27)
1In Descriptive statistics, you are describing, presenting, summarizing, and organizing your data, either through ______________.
- ANumerical Calculations
- BGraphs
- CTables
- DAll of them
2Which of the following is a Measure of Central Tendency?
- AMean
- BMedian
- CMode
- DAll of them
3Which of the following is less affected by outliers?
- AMean
- BMedian
- CMode
- DNone of them
4Which of the following is not affected by outliers?
- AMean
- BMedian
- CMode
- DNone of them
5Which of the following is a Measure of Variability?
- ARange & Interquartile range
- BVariance
- CStandard Deviation
- DAll of them
6The bigger the range of data the more ________it is?
- ADistributed
- BUndistributed
- CLeft Skewed
- DRIght Skewed
7Interquartile range (IQR) is the difference between _______.
- AQ1 - Q3
- BQ2 - Q3
- CQ3 - Q1
- DNone of them
8Range Measures_____________of the datapoint?
- ABeginning
- BEnd
- CBeginning and End
- DIQR
9The interquartile range (IQR) is a Measure of data where___________.
- AFewer values lie
- BThe majority of values lie
10Variance is the Average of______________from the mean.
- ASquared deviation
- BSquare root of deviation
11Standard deviation is _____________.
- ASquare root of Variance
- BSquare of Variance
12When you have a low Standard deviation, your data points tend to be _________ the mean.
- AFar from
- BClose to
13When you have a high standard deviation, your data points tend to be ________ the mean.
- AFar from
- BClose to
14Normal Distribution is _____________.
- ABell shaped
- BLeft Skewed
- CRIght Skewed
- DNone
15Z-Score is used to check how many standard deviations away from the mean, a _________________lies.
- ADistribution of entire data
- BSpecific data point in a data
16Which of the following are the Terminologies of Probability?
- AEvent, Outcome
- BExperiment, Probability
- CAll of them
- DNone of them
17Bernoulli Trials have _________ outcomes.
- AExactly one
- BExactly two
- CExactly three
- DExactly four
18The Binomial distribution is the Probability distribution of the number of successes in _________Bernoulli trials.
- Aone
- Btwo
- Cthree
- Dn
19Probability Density Function is the Probability distribution of a ____________ random variable.
- AContinuous random variable
- BDiscrete random variable
20The area under a probability density function gives the probability for the __________ variable to be in that range.
- AContinuous random
- BDiscrete random
21Taking __________ samples of equal size from the data, the sample means are approximately normally distributed.
- ARandom
- BCluster
- CStratified
- DSystematic
22In a normal distribution the ________________.
- AMean > Median > Mode
- BMean = Median < Mode
- CMean = Median = Mode
- DMean < Median < Mode
23Normal distribution with a mean _____ and a standard deviation of ____ is called a Standard Normal Distribution.
- A1,0
- B0,1
- C0,0
- DNone of them
24Central 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.- ALeft Skewed
- BRight Skewed
- CNormal
- DNone of them
25The Central Limit Theorem also states that the mean of __________ means is approximately equal to the mean of __________means.
- APopulation, Sample
- BPopulation
- CSample
- DNone
26A 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.- ABelow, Above
- BBelow
- CAbove, Below
- DAbove
27______% 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- A68.27%
99.73%
95.45% - B68.27%
95.45%
99.73% - C99.73%
95.45%
68.27% - D68.27%
95.45%
99.73%
- A68.27%
Información
- Descripción
- A Basic quiz on Descriptive Statistics for Data Science.
- Autor
- Vishakha Achmare
- Idioma
- English
- Visitas
- 100
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test