Statistical Inference and Hypothesis TestingConfidence Interval Estimation (ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern)): Questions 59  60 of 73
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Question number: 59
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
According to a water supply company, the mean water bill per year in 2010 is 1500 Rs. And he wants to estimate the amount of water bill per year in 2016. He takes a random sample of 18 households and obtains the following amounts, (in Rs) for the year 2016 of water bill. It is given that
1608  1875  1264 
1794  1478  1999 
1828  2206  1798 
1794  1738  1740 
1598  1486  1830 
1568  1941  1516 
how can you interpret the answer if you compute 95 % confidence interval of the mean water bill?
Choices
Choice (4)  Response  

a.  It appears that the mean annual water bill has increased from 2010 to 2016 

b.  It appears that there is no change in the mean annual water bill from 2010 to 2016 

c.  It appears that the mean annual water bill has decreased from 2010 to 2016 

d.  All of the above 

Question number: 60
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
Let be a random sample and and be any two statistics such that , then the confidence limits for a parametric function of can be obtained by the relation
Choices
Choice (4)  Response  

a.  and 

b.  and 

c.  and 

d.  Question does not provide sufficient data or is vague 
