Statistical Inference and Hypothesis Testing-Confidence 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 |
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| b. | It appears that there is no change in the mean annual water bill from 2010 to 2016 |
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| c. | It appears that the mean annual water bill has decreased from 2010 to 2016 |
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| d. | All of the above |
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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 |
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| b. | and |
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| c. | and |
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| d. | Question does not provide sufficient data or is vague |
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