Changing the way you learn

Question 1

Question

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

Answer

Numerical Calculations
Graphs
Tables
All of them

Question 2

Question

Which of the following is a Measure of Central Tendency?

Answer

Mean
Median
Mode
All of them

Question 3

Question

Which of the following is less affected by outliers?

Answer

Mean
Median
Mode
None of them

Question 4

Question

Which of the following is not affected by outliers?

Answer

Mean
Median
Mode
None of them

Question 5

Question

Which of the following is a Measure of Variability?

Answer

Range & Interquartile range
Variance
Standard Deviation
All of them

Question 6

Question

The bigger the range of data the more ________it is?

Answer

Distributed
Undistributed
Left Skewed
RIght Skewed

Question 7

Question

Interquartile range (IQR) is the difference between _______.

Answer

Q1 - Q3
Q2 - Q3
Q3 - Q1
None of them

Question 8

Question

Range Measures_____________of the datapoint?

Answer

Beginning
End
Beginning and End
IQR

Question 9

Question

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

Answer

Fewer values lie
The majority of values lie

Question 10

Question

Variance is the Average of______________from the mean.

Answer

Squared deviation
Square root of deviation

Question 11

Question

Standard deviation is _____________.

Answer

Square root of Variance
Square of Variance

Question 12

Question

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

Answer

Far from
Close to

Question 13

Question

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

Answer

Far from
Close to

Question 14

Question

Normal Distribution is _____________.

Answer

Bell shaped
Left Skewed
RIght Skewed
None

Question 15

Question

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

Answer

Distribution of entire data
Specific data point in a data

Question 16

Question

Which of the following are the Terminologies of Probability?

Answer

Event, Outcome
Experiment, Probability
All of them
None of them

Question 17

Question

Bernoulli Trials have _________ outcomes.

Answer

Exactly one
Exactly two
Exactly three
Exactly four

Question 18

Question

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

Answer

one
two
three
n

Question 19

Question

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

Answer

Continuous random variable
Discrete random variable

Question 20

Question

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

Answer

Continuous random
Discrete random

Question 21

Question

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

Answer

Random
Cluster
Stratified
Systematic

Question 22

Question

In a normal distribution the ________________.

Answer

Mean > Median > Mode
Mean = Median < Mode
Mean = Median = Mode
Mean < Median < Mode

Question 23

Question

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

Answer

1,0
0,1
0,0
None of them

Question 24

Question

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.

Answer

Left Skewed
Right Skewed
Normal
None of them

Question 25

Question

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

Answer

Population, Sample
Population
Sample
None

Question 26

Question

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.

Answer

Below, Above
Below
Above, Below
Above

Question 27

Question

______% 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

Answer

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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Descriptive Statistics for Data Science

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	Created by Vishakha Achmare almost 4 years ago