initial commit / add all books

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diff --git a/1475/CH3/EX3.14/Example_3_14.sce b/1475/CH3/EX3.14/Example_3_14.sce
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+//Example 3.14 A A simple random sample of size is 5

+clc;

+clear;

+n=5;

+N=41;

+s_d=6.25;

+disp(s_d,"Standard Deviation",N,"Total Units",n,"Drawn sample of size is ");

+disp((s_d/sqrt(n))*(sqrt((N-n)/(N-1))),"Standard error is " );

diff --git a/1475/CH3/EX3.14/Output_3_14.PNG b/1475/CH3/EX3.14/Output_3_14.PNG
new file mode 100755
index 000000000..7e0fc0417
--- /dev/null
+++ b/1475/CH3/EX3.14/Output_3_14.PNG
diff --git a/1475/CH3/EX3.15/Example_3_15.sce b/1475/CH3/EX3.15/Example_3_15.sce
new file mode 100755
index 000000000..f9e2e2c48
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+++ b/1475/CH3/EX3.15/Example_3_15.sce
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+//Example 3.15 The safety limit of a crane is known to be 32 tons

+clc;

+clear;

+m=0.3;

+s_d=0.2;

+n=100;

+disp(n,"Sample size =",s_d,"Standard Deviation",m,"Mean");

+disp(s_d/sqrt(n),"and Standard Deviation =",0.3,"Since the sample size n=100 is large, the sample mean follows normal distribution approx. with Mean=");

+disp(0.1587,"Probab. that mean is greater than 0.32=Area under the standard normal curve to the right of the ordinate at z=1",(0.32-m)/0.02,"The standarised value of sample mean 0.32 is ");

diff --git a/1475/CH3/EX3.15/Output_3_15.PNG b/1475/CH3/EX3.15/Output_3_15.PNG
new file mode 100755
index 000000000..e4a3d4c5e
--- /dev/null
+++ b/1475/CH3/EX3.15/Output_3_15.PNG
diff --git a/1475/CH3/EX3.16/Example_3_16.sce b/1475/CH3/EX3.16/Example_3_16.sce
new file mode 100755
index 000000000..1dd4df31b
--- /dev/null
+++ b/1475/CH3/EX3.16/Example_3_16.sce
@@ -0,0 +1,11 @@
+//Example 3.16 It has been found 2 percent of tools

+clc;

+clear;

+m=0.02;

+p=m;

+q=1-p;

+n=400;

+s_d=sqrt((p*q)/n);

+disp(n,"Sample size =",s_d,"Standard Deviation",m,"Mean");

+disp("Since the sample size n=400 is large, the sample mean follows normal distribution ");

+disp(0.5-0.4236,"Probab. that the sample proportion p exceeds 0.03 = Area under the standard normal curve to the right of the ordinate at z= (0.03-0.02)/0.007",(0.03-0.02)/0.007,"The standarised value of z is ");

diff --git a/1475/CH3/EX3.16/Output_3_16.PNG b/1475/CH3/EX3.16/Output_3_16.PNG
new file mode 100755
index 000000000..e72cb65a8
--- /dev/null
+++ b/1475/CH3/EX3.16/Output_3_16.PNG
diff --git a/1475/CH3/EX3.26/Example_3_26.sce b/1475/CH3/EX3.26/Example_3_26.sce
new file mode 100755
index 000000000..521a00ba9
--- /dev/null
+++ b/1475/CH3/EX3.26/Example_3_26.sce
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+//Example 3.26 The mean of a certain normal distribution is equal to the standard error

+clc;

+clear;

+n=49;

+disp("Mean = S.E in sample size of 25 i.e s_d=5(m)",49,"Total Sample = ");

+disp(1-0.9192,"Probab. of P(x<0), when n=40. Since the population is normal = P(x<0)=");

diff --git a/1475/CH3/EX3.26/Output_3_26.PNG b/1475/CH3/EX3.26/Output_3_26.PNG
new file mode 100755
index 000000000..b61454db0
--- /dev/null
+++ b/1475/CH3/EX3.26/Output_3_26.PNG