Estimation and Confidence Intervals in Statistics MCQ
Estimation and Confidence Intervals in Statistics MCQ
1. For the same data, decreasing the certainty of an estimate will result in a less precise estimate.
Answer
Correct Answer:
False
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2. To estimate the population mean for the related-samples t, the estimated standard error of the difference scores must be known.
Answer
Correct Answer:
True
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3. When the null hypothesis is outside a confidence interval, this indicates that it would likely be rejected with hypothesis testing.
Answer
Correct Answer:
True
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4. Upper confidence level is the largest possible value of a standard error in a specified confidence interval.
Answer
Correct Answer:
False
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5. Research has found that the average IQ in the United States is 100 points, which is a point estimate.
Answer
Correct Answer:
True
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6. A researcher increases her level of confidence from 95% to 99%. What will happen to the precision of her estimate?
Answer
Correct Answer:
The estimate will be less precise.
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7. In a sample of eight participants, a researcher estimates the 95% CI for a sample with a mean of M = 15 and an estimated standard error for the difference scores of 5.35. What is the confidence interval at this level of confidence?
Answer
Correct Answer:
95% CI 2.35, 27.65
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8. In a sample of 18 participants, a researcher estimates the 95% CI for a sample with a mean of M = 8.8 and an estimated standard error for the difference of 1.8. What is the lower confidence limit for this interval?
Answer
Correct Answer:
5.0
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9. A researcher surveys the amount of caffeinated drinks consumed by 12 participants and estimates the 80% CI for a sample with a mean of M = 22.3 and an estimated standard error of 4.7. What is the confidence interval at this level of confidence?
Answer
Correct Answer:
80% CI 15.9, 28.7
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10. A researcher surveys the amount of caffeinated drinks consumed by 12 participants and estimates the 80% CI for a sample with a mean of M = 22.3 and an estimated standard error of 4.7. What is the confidence interval at this level of confidence?
Answer
Correct Answer:
80% CI 15.9, 28.7
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11. The estimated standard error for the difference is used to compute the confidence interval for which test?
Answer
Correct Answer:
Two-independent sample
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12. The confidence interval for one sample selected from a population with an unknown variance is computed using a critical value for which type of test?
Answer
Correct Answer:
T test
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13. The z score for a 90% confidence interval is:
Answer
Correct Answer:
±1.645.
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14. The z score for a 90% confidence interval is:
Answer
Correct Answer:
±1.645.
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15. Which of the following explains why interval estimation can be a useful procedure to estimate a population mean?
Answer
Correct Answer:
It defines the range of scores within which the population mean is likely to be containe
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16. The goal of ______ is the same as that in hypothesis testing: to learn more about the value of a mean or mean difference in a population of interest.
Answer
Correct Answer:
Estimation
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17. A statistical procedure in which a sample mean is selected to determine the likelihood of obtaining that mean if the null hypothesis were true is:
Answer
Correct Answer:
Significance testing.
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18. Upper Confidence Limit is the _____ possible value of a population parameter in a confidence interval with a specified level of confidence.
Answer
Correct Answer:
Largest
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19. A statistical procedure that involves the use of a sample statistic to estimate a population parameter is known as_____
Answer
Correct Answer:
Point estimation
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20. Lower Confidence Limit is the _____ possible value of a population parameter in a confidence interval with a specified level of confidence.
Answer
Correct Answer:
Smallest
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21. Level of Confidence is the probability or likelihood that an interval estimate will contain an unknown population parameter.
Answer
Correct Answer:
True
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22. Interval Estimation is a statistical procedure in which a sample of data is used to find the _____ of possible values within which a population parameter is likely to be contained.
Answer
Correct Answer:
Both a and b
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23. How many types of estimation are there?
Answer
Correct Answer:
Two
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24. The upper and lower boundaries of a confidence interval given within a specified level of confidence refer to_____
Answer
Correct Answer:
Both a and b
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25. Confidence Interval is the interval or range of possible values within which a known population parameter is likely to be contained.
Answer
Correct Answer:
False
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26. Confidence Boundaries are the _____ boundaries of a confidence interval given within a specified level of confidence.
Answer
Correct Answer:
Both a and c
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Statistics (Social And Behavioral Sciences) MCQs | Topic-wise
