Estimate the standard deviation of the process, Applied Statistics

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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.	70	68	67	65
3.	68	66	65	62
4.	69	70	67	68
5.	70	68	68	66
6.	68	67	70	69
7.	68	60	66	61
8.	72	71	66	67
9.	70	69	69	66
10.	66	68	67	66
11.	72	73	67	64
12.	72	68	67	65
13.	70	67	69	63
14.	70	64	68	72
15.	74	70	67	68

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

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