Statistical Quality Control & Textile Costing — Winter 2018

State the properties of binomial distribution.

Explain in briefly about theory of probability.

Explain in detail about DMAIC process.

Stat the advantages of acceptance of sampling.

Describe the different methods of costing.

Five observations are taken daily, for six days from a production process. Find out LCL and UCL for X-bar and Rcharts.(A = 0.577,2 D = 0, D = 2.114)34 Date Observation

For spinning 18s warp carded yarn, three qualities of cottons are used. Their proportions and rates/kg are as shown below. Cotton Variety % in mix Cost/kg. (in Rs.) A 8 5.84 B 88 5.00 C 4 3.00 Calculate clean cotton cost/kg, if yarn realization is 86% & that out of 14 kg lost per 100kg put through, 8 kg are saleable at 1.75 Rs./kg.

State the properties of normal distribution.

Define terms: 1. Mean 2. Coefficient of variation 3. Mean deviation 4. Standard deviation.

Find mean and mode for the following classified data. Class 0-5 5-10 10-15 15-20 20-25 25-30 Frequency 2 4 4 6 5

What is break even analysis?

What is correlation? Explain positive and negative correlation.

The results of percentage humidity and warp breakages were recorded from a weaving factory as follows. % Humidity 60 62 59 70 56 58 75 Warp breakages 112 110 120 102 122 118 90 Compute Karl Pearson’s coefficient of correlation from the above data and comment on it.

Describe various types of scatter diagram.

Explain briefly control charts.

Find the spearmen’s rank correlation coefficient for the following data of marks in physics and textile testing and comment on it. Marks in Physics 70 60 65 50 58 75 68 Marks in textile testing 74 62 70 40 45 78 56

Factor affecting sampling.

Discuss labour cost in brief.

An experiment was conducted to study the effect of a dye produced by four different companies (A, B, C, and D) on the strength of the fabric and following results were obtained. Dye A B C D Fabric strength Carry out the analysis (One way ANOVA) of above data and write the conclusion. (Table value of Ffor 3, 12 degree of freedom at 5% level=3.49)

What is marginal costing? What is its importance?

Explain Poisson distribution briefly.

Five strength tests each carried out on the two fabrics have shown following results. A 15.2 15.5 15.0 15.4 15.6 B 15.0 14.8 13.6 15.5 15.2 Find CV% for both and decide which fabric is more consistent?

State the steps in planning of an experiment.

Discuss various types of overheads briefly.

If the value of correlation coefficient between the two variable Xand Yis 0.83, find the equation of regression of Xon Yand Yon Xusing following data. Variables X Y Mean 112 65 Standard deviation 2.5 3.2