Statistical Inference and Hypothesis Testing-Confidence Interval Estimation [ISS (Statistical Services) Statistics Paper II]: Questions 33 - 37 of 72
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Question 33
Question MCQ▾
In a college survey, children were asked how many hours they study per day. A sample of 22 children is collected. The mean was 3.25 hours with a standard deviation of 1.57 hours. Then 95% and 99% confidence interval for the number of hours of study per day is
Choices
Choice (4) | Response | |
---|---|---|
a. | and | |
b. | and | |
c. | and | |
d. | Question does not provide sufficient data or is vague |
Question 34
Question MCQ▾
A survey of 200 factory workers provides a sample mean of 7.10 hours worked. What is the 95% confidence interval based on this sample. Calculated standard deviation is 5 hours.
Choices
Choice (4) | Response | |
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a. | ||
b. | ||
c. | ||
d. | Both b. and c. are correct |
Question 35
Question MCQ▾
The 99% confidence interval for of the normal population is given by
Choices
Choice (4) | Response | |
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a. | ||
b. | ||
c. | ||
d. |
Question 36
Question MCQ▾
It is given that n = 1029, and . Then the 90% Confidence Interval for the population mean is given by
Choices
Choice (4) | Response | |
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a. | ||
b. | ||
c. | ||
d. |
Question 37
Question MCQ▾
Suppose we take a random sample from some population and obtain a 96% confidence interval for the population mean, , then which quantity is guaranteed to be in the interval?
Choices
Choice (4) | Response | |
---|---|---|
a. | μ | |
b. | s | |
c. | ||
d. | μ & s |