1 For a given confidence interval, if we wish to increase the precision of a con

Question

1 For a given confidence interval, if we wish to increase the precision of a confidence interval we need increase the level of confidence. True False -| 2 For a 28% confidence interval for the population mean, the correct z-score is ·|3 If zero lies in a 95% confidence interval for , then zero is also inside the 99% confidence interval for . True False >|4 If we multiply our sample size by two, the standard error of the sample mean will be cut in half. True False |5 If we sample 15 observations from a skewed distribution we cannot construct a confidence interval for the population mean because the sample mean cannot be expected to follow a normal distribution yet. True False

Explanation / Answer

a) True, for increase precision, one way of doing it is to increase confidence

b) Z score would be 0

c) True, 0 will also contain 0

d) No, its not true. Standard error is inversely proportional to square root of sample size

e) True, for sample less than 30, it is not applicable

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.