ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern): Questions 156  159 of 253
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Question number: 156
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
A fan manufacturing company needs to know the average amount of time it takes to install a fan. A technique installs it in 64 different houses and the average time of installation is 42 minutes. The calculated standard deviation is 5 minutes. Then 95 % confidence interval foethe mean installation time is
Choices
Choice (4)  Response  

a. 
 
b.  42 + 1.225  
c. 
 
d.  Both a. and c. are correct 
Question number: 157
» Statistical Inference and Hypothesis Testing » Minimum Variance Unbiased Estimators
Question
Suppose are the unbiased estimators of with Efficiencies and respectively. and is the correlation coefficient between them. Then
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 158
» Statistical Inference and Hypothesis Testing » Simple and Composite Hypotheses
Question
The hypothesis is known as
Choices
Choice (4)  Response  

a.  The hypothesis is known as Composite Hypothesis  
b.  Simple Hypothesis  
c.  Null Hypothesis  
d.  Alternative Hypothesis 
Question number: 159
» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation
Question
The Indian Government wants the information of children per family. It takes a random sample of 40 families and the numbers of children in the selected families are
1  2  1  2 
1  1  1  1 
5  4  3  4 
1  0  1  2 
1  0  3  0 
0  0  2  2 
5  3  1  0 
8  1  0  1 
2  1  1  5 
2  1  2  3 
Calculated standard deviation is σ =1.95. Obtain the 90 % confidence interval for the mean number of children per family in India
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
