Vishakha Achmare
Quiz by , created more than 1 year ago

A Basic quiz on Descriptive Statistics for Data Science.

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Vishakha Achmare
Created by Vishakha Achmare almost 4 years ago
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Descriptive Statistics for Data Science

Question 1 of 27

1

In Descriptive statistics, you are describing, presenting, summarizing, and organizing your data, either through ______________.

Select one of the following:

  • Numerical Calculations

  • Graphs

  • Tables

  • All of them

Explanation

Question 2 of 27

1

Which of the following is a Measure of Central Tendency?

Select one of the following:

  • Mean

  • Median

  • Mode

  • All of them

Explanation

Question 3 of 27

1

Which of the following is less affected by outliers?

Select one of the following:

  • Mean

  • Median

  • Mode

  • None of them

Explanation

Question 4 of 27

1

Which of the following is not affected by outliers?

Select one of the following:

  • Mean

  • Median

  • Mode

  • None of them

Explanation

Question 5 of 27

1

Which of the following is a Measure of Variability?

Select one of the following:

  • Range & Interquartile range

  • Variance

  • Standard Deviation

  • All of them

Explanation

Question 6 of 27

1

The bigger the range of data the more ________it is?

Select one of the following:

  • Distributed

  • Undistributed

  • Left Skewed

  • RIght Skewed

Explanation

Question 7 of 27

1

Interquartile range (IQR) is the difference between _______.

Select one of the following:

  • Q1 - Q3

  • Q2 - Q3

  • Q3 - Q1

  • None of them

Explanation

Question 8 of 27

1

Range Measures_____________of the datapoint?

Select one of the following:

  • Beginning

  • End

  • Beginning and End

  • IQR

Explanation

Question 9 of 27

1

The interquartile range (IQR) is a Measure of data where___________.

Select one of the following:

  • Fewer values lie

  • The majority of values lie

Explanation

Question 10 of 27

1

Variance is the Average of______________from the mean.

Select one of the following:

  • Squared deviation

  • Square root of deviation

Explanation

Question 11 of 27

1

Standard deviation is _____________.

Select one of the following:

  • Square root of Variance

  • Square of Variance

Explanation

Question 12 of 27

1

When you have a low Standard deviation, your data points tend to be _________ the mean.

Select one of the following:

  • Far from

  • Close to

Explanation

Question 13 of 27

1

When you have a high standard deviation, your data points tend to be ________ the mean.

Select one of the following:

  • Far from

  • Close to

Explanation

Question 14 of 27

1

Normal Distribution is _____________.

Select one of the following:

  • Bell shaped

  • Left Skewed

  • RIght Skewed

  • None

Explanation

Question 15 of 27

1

Z-Score is used to check how many standard deviations away from the mean, a _________________lies.

Select one of the following:

  • Distribution of entire data

  • Specific data point in a data

Explanation

Question 16 of 27

1

Which of the following are the Terminologies of Probability?

Select one of the following:

  • Event, Outcome

  • Experiment, Probability

  • All of them

  • None of them

Explanation

Question 17 of 27

1

Bernoulli Trials have _________ outcomes.

Select one of the following:

  • Exactly one

  • Exactly two

  • Exactly three

  • Exactly four

Explanation

Question 18 of 27

1

The Binomial distribution is the Probability distribution of the number of successes in _________Bernoulli trials.

Select one of the following:

  • one

  • two

  • three

  • n

Explanation

Question 19 of 27

1

Probability Density Function is the Probability distribution of a ____________ random variable.

Select one of the following:

  • Continuous random variable

  • Discrete random variable

Explanation

Question 20 of 27

1

The area under a probability density function gives the probability for the __________ variable to be in that range.

Select one of the following:

  • Continuous random

  • Discrete random

Explanation

Question 21 of 27

1

Taking __________ samples of equal size from the data, the sample means are approximately normally distributed.

Select one of the following:

  • Random

  • Cluster

  • Stratified

  • Systematic

Explanation

Question 22 of 27

1

In a normal distribution the ________________.

Select one of the following:

  • Mean > Median > Mode

  • Mean = Median < Mode

  • Mean = Median = Mode

  • Mean < Median < Mode

Explanation

Question 23 of 27

1

Normal distribution with a mean _____ and a standard deviation of ____ is called a Standard Normal Distribution.

Select one of the following:

  • 1,0

  • 0,1

  • 0,0

  • None of them

Explanation

Question 24 of 27

1

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.

Select one of the following:

  • Left Skewed

  • Right Skewed

  • Normal

  • None of them

Explanation

Question 25 of 27

1

The Central Limit Theorem also states that the mean of __________ means is approximately equal to the mean of __________means.

Select one of the following:

  • Population, Sample

  • Population

  • Sample

  • None

Explanation

Question 26 of 27

1

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.

Select one of the following:

  • Below, Above

  • Below

  • Above, Below

  • Above

Explanation

Question 27 of 27

1

______% 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

Select one of the following:

  • 68.27%
    99.73%
    95.45%

  • 68.27%
    95.45%
    99.73%

  • 99.73%
    95.45%
    68.27%

  • 68.27%
    95.45%
    99.73%

Explanation

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