Statistical Inference and Hypothesis TestingConfidence Interval Estimation (ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern)): Questions 6  8 of 73
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Question number: 6
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
A school wants to study the number of days the students will be absent from school per year. It surveys attendance of 10 children and the number of days the children is absent from schools are
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9  11 
7  8 
4  9 
5  8 
Standard deviation . Then 95 % Confidence interval on population mean is
Choices
Choice (4)  Response  

a.  8.6±2.05 

b.  6.55 ≤ μ ≤ 10.65 

c. 


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

Question number: 7
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
Suppose we want to estimate the mean amount of money spent by students on some project in a year. We have the following data of 10 randomly selected students. and calculated sample mean is 249 Rs. and standard deviation is 30 Rs. 95 % Confidence interval for is:
Choices
Choice (4)  Response  

a. 


b.  256.89±290.68 

c. 


d. 


Question number: 8
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
Formula for obtaining 99 % confidence limits for the mean μ of a Normal population with mean μ and standard deviation σ are
Choices
Choice (4)  Response  

a. 


b. 


c. 


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