ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 142  145 of 253
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Question number: 142
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
The Government conducts national survey to study about the home gardening.
A random sample of 250 households is taken, which have their own vegetable gardens. The average size of their gardens is 643 sq. ft. The calculated standard deviation is σ = 247 sq. ft. Then 90 % confidence interval for the mean size µ, of all household vegetable gardens is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 143
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
Formula for the Confidence interval with confidence coefficient for the variance of the Normal distribution when is known, is given by
Choices
Choice (4)  Response  

a. 


b. 


c.  Both a. and b. are correct 

d.  Question does not provide sufficient data or is vague 

Question number: 144
» Statistical Inference and Hypothesis Testing » Moments and Least Squares
Question
Linear estimators obtained by the method of least squares are
Choices
Choice (4)  Response  

a.  MVU Estimators 

b.  Sufficient Estimators 

c.  Unbiased Estimators 

d.  Question does not provide sufficient data or is vague 

Question number: 145
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
The Government conducts national survey to study about the home gardening.
A random sample of 250 households is taken which have vegetable gardens. The average size of their gardens is 643 square feet. The calculated standard deviation is σ = 247 square feet. How can you interpret the result at 90 % for confidence interval?
Choices
Choice (4)  Response  

a.  Probability that mean size of household vegetable gardens lies in the interval 617.31 and 668.69 is 0.90 

b.  617.31 and 668.69 are 90 percent confidence limits 

c.  The length of the confidence interval is 51.38 

d.  All a. , b. and c. are correct 
