Statistical Inference and Hypothesis Testing-Confidence Interval Estimation [ISS (Statistical Services) Statistics Paper II]: Questions 1 - 6 of 72
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Question 1
Question MCQ▾
It is given that , and . Then the 95% Confidence Interval for the population mean
Choices
Choice (4) | Response | |
---|---|---|
a. | 18 ± 222.45 | |
b. | 1725.61 ± 110.69 | |
c. | 1725.61 ± 222.45 | |
d. | 1725.61 ± 897.36 |
Question 2
Question MCQ▾
The diameter of cylindrical rods is assumed to be normally distributed with a standard deviation of 0.91 cm. A sample of 25 rods has a mean diameter of 4.5 cm. 95% confidence limits for population mean are:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | 1.9±0.098 | |
d. | All of the above |
Question 3
Question MCQ▾
As the level of confidence level decreases, the size of the corresponding interval will
Choices
Choice (4) | Response | |
---|---|---|
a. | Decrease | |
b. | Remains the same | |
c. | Increase | |
d. | All of the above |
Question 4
Question MCQ▾
It is given that , , . then 90% Confidence Interval for is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. | Question does not provide sufficient data or is vague |
Question 5
Question MCQ▾
is the Confidence intervals for when … and is the Confidence intervals for when …
Choices
Choice (4) | Response | |
---|---|---|
a. | and | |
b. | and | |
c. | and | |
d. | All of the above |
Question 6
Question MCQ▾
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
12 | 13 |
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. | ||
c. | 6.55⩽μ⩽10.65 | |
d. | All a., b. and c. are correct |