Ievolve Course Id - 5337 Data Science
E0- Fresco Play - Basics of Statistics and Probabolity - Hands on Answers
1.Welcome to Probability and Statistics -1
Permutations and Combinations – Hands-on
import numpy as np
from scipy import stats
import statistics
def measures(arr):
#Write your code here
'''
Input: arr : numpy array
Return : mean,median,std_deviation,variance,mode,iqr : float
Note:
1. Assign the values to designated variables
2. Round off to 2 decimal places
'''
mean=round(np.mean(arr),2)
median=round(np.median(arr),2)
std_deviation=round(np.std(arr),2)
variance=round(np.var(arr),2)
mode=round(statistics.mode(arr),2)
iqr=round(stats.iqr(arr),2)
return mean,median,std_deviation,variance,mode,iqr if name==’main‘:
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2.Welcome to Probability and Statistics -2
Combinations with Factorial – Hands-on
from itertools import combinations
from itertools import permutations
import numpy as np
import math
def comb_perm(arr):
#Write your code here
'''
Input: arr : numpy array
Return : no_of_comb,no_of_perm : Integer
'''
no_of_comb= len(list(combinations(arr,2)))
no_of_perm= len(list(permutations(arr,2)))
return no_of_comb,no_of_permif name==’main‘:
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3.Welcome to Probability and Statistics -3
Statistics
import math
def dancers():
'''
output: ans : Integer
'''
#Write your code here
#Assign your value to variable ans
ans= 200
return int(ans)if name==’main‘:
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4.Welcome to Probability and Statistics -4
Mutually Exclusive Events
from scipy import stats
def binomial():
'''
output: ans : Float
'''
#Write your code here
#Assign the probability value to the variable ans
#Round off to 2 decimal places
ans = 0.97
return ansif name==’main‘:
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5.Welcome to Probability and Statistics -5
Non-mutually Exclusive Events
from scipy import stats
def poisson():
'''
output: ans : Float
'''
#Write your code here
#Assign the probability value to the variable ans
#Round off to 2 decimal places
ans= 0.03
return ansif name==’main‘:
*****************************************************************
6.Welcome to Probability and Statistics -6
Binomial – Hands-on
from scipy import stats
def spinner():
'''
output: ans : Float
'''
#Write your code here
#Assign the probability value to the variable ans
# Round off to 2 decimal places
ans= 0.5
return ans if name==’main‘:
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7.Welcome to Probability and Statistics -7
Poisson – Hands-on
from scipy import stats
def accident():
'''
output: ans : Float
'''
#Write your code here
#Assign the probability value to the variable ans. Round off to 2 decimal places
ans= 0.26
return ansif name==’main‘:
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8.Welcome to Probability and Statistics -8
Chi-squared Test – Hands-on
from scipy.stats import chi2_contingency
from scipy.stats import chi2
def chi_test():
'''
Output
1. stat: Float
2. dof : Integer
3. p_val: Float
4. res: String
'''
#Note: Round off the Float values to 2 decimal places.
stat= 23.57
dof= 12
p_val= 0.02
res= "Reject the Null Hypothesis"
return stat,dof,p_val,res if name==’main‘:
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