Download OU B.Sc 2018 May-June 2nd Year 2nd Semester 7116 Statistics Question Paper

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FACULTY OF SCIENCE Code No. 7118

B.Sc. IV-Semester (CBCS) Examination

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Subject: Statistics

Paper - IV

Inference

May / June 2018

Time: 3 Hours

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PART - A (5x4 = 20 Marks) Max.Marks: 80

[Short Answer Type]

Note: Answer any five of the following Questions

1. Explain two types of error in testing of hypothesis.
2. Explain about non-randomized test.

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3. Describe the large sample test procedure for difference of standard deviations.
4. Explain Fisher's Z-transformation for Population correlation coefficient.
5. Explain the Chi-square test for goodness of Fit.
6. Explain about F-test for equality of population variances.
7. Discuss advantages and disadvantages of non-parametric tests.

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8. Describe nominal, ordinal, interval and ratio scales.

PART - B (4x15 = 60 Marks)

1. a) Describe the test of significance of difference of proportions for large samples.

   Data on days to maturity were recorded in two varieties of a pulse crop. Determine whether two means are significantly different.

   	n	Mean	Variance
   Variety A	60	60	8.20
   Variety B	65	65	11.13

   OR

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   b) Define order statistics and state their distributions.

   Describe run test procedure and its purpose for two sample case.

2. a) Describe the x²-test for independence of attributes and x²-test for specified variance.

   OR

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   b) Explain:

   1. t - test for difference of means
   2. t - test for specified mean.

3. a) i) Explain the Median Test procedure

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   ii) Describe test procedure for Wilcoxon-Mann-Whitney U test.

   OR

   b) i) Explain Wilcoxon - Signed Rank Test for paired samples.

   ii) Describe the test procedure for sign test.

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