# ISS Statistics Paper IV: Questions 43 - 48 of 79

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## Question number: 43

» Statistical Quality Control » Control Charts » Variable

Essay Question▾

### Describe in Detail

Following data gives the diameter of the rings manufactured by a company. Obtain the Control limits for R-chart.

 Sample No. Observations 1 5.02 5.01 4.94 4.99 4.96 2 5.01 5.03 5.07 4.95 4.96 3 4.99 5.00 4.93 4.92 4.99 4 5.03 4.91 5.01 4.98 4.89 5 4.95 4.92 5.03 5.05 5.01 6 4.97 5.06 5.06 4.96 5.03 7 5.05 5.01 5.10 4.96 4.99 8 5.09 5.10 5.00 4.99 5.08 9 5.14 5.10 4.99 5.08 5.09 10 5.01 4.98 5.08 5.07 4.99

### Explanation

 Sample No. Observations Total Sample Mean Range 1 5.02 5.01 4.94 4.99 4.96 24.92 4.98 0.08 2 5.01 5.03 5.07 4.95 4.96 25.02 5.00 0.12 3 4.99 5.00 4.93 4.92 4.99 24.83 4.97… (177 more words) …

## Question number: 44

Appeared in Year: 2013

Essay Question▾

### Describe in Detail

For a PBIB design with parameters, b, r, k, , show that

### Explanation

A PBIB design with m associate classes based on the association scheme is an arrangement of treatments into b blocks such that

(i) Each block contains k distinct treatments (k <

(ii) Each treatment occurs in r blocks

(iii) Any two treatments, which are ith associates… (90 more words) …

## Question number: 45

Appeared in Year: 2012

Essay Question▾

### Describe in Detail

Discus symmetrical BIBD. For an SBIBD, under usual notations, show that

=

### Explanation

Symmetrical BIBD:

A BIBD is said to be symmetric if b = υ and r = k.

υ, r, b, k and λ are called the parameters of the BIBD

υ= number of varities or treatments

b = number of blocks

r = number of replicates for each treatment… (140 more words) …

## Question number: 46

Appeared in Year: 2015

Essay Question▾

### Describe in Detail

Discuss how you would proceed with the analysis if data on one plot is missing in a Latin Square design.

### Explanation

To analysis the data of a Latin square design having missing values, we first estimate the missing value by minimizing the error mean square and the rest missing values by guess estimate which is generally the mean of all available values. The estimated value of x is obtain by to… (210 more words) …

## Question number: 47

Appeared in Year: 2011

### Write in Short

Explain Randomized block design.

## Question number: 48

Appeared in Year: 2015

Essay Question▾

### Describe in Detail

Explain briefly the main principles of design of experiment and analogy in sample surveys with the corresponding concepts.

### Explanation

The main principle of design of experiment is to study the sampling error. If these principles hold, the chance of getting a data set or a design which could be analyzed, with less doubt about structural nuisances, is higher as if the data was collected arbitrarily.

Principle 1: Fisher’s Principle… (379 more words) …

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