Estimate the standard deviation of the process:
Draw the X (bar) and R charts for the data given and give your comments about the process under study. Estimate the standard deviation of the process.
Sample No.
Individual Measurement
1.
72
70
-70
64
2.
68
67
65
3.
66
62
4.
69
5.
6.
7.
60
61
8.
71
9.
10.
11.
73
12.
13.
63
14.
15.
74
Ques: Differentiate between :
i) Parameter and Statistics
ii) Target Population and Sampled Population
iii) Stratified Random Sampling and Cluster Sampling
iv) Multistage Sampling and Multiphase Sampling
v) Sampling errors and Non-Sampling Errors