Which of the following is not true when constructing a confidence interval for a

Question

Which of the following is not true when constructing a confidence interval for a population O a) data should come from a simple random sample from the population of interest 0 b) the sampling distribution of x is approximately normal mean: d) we must expand the mean by z' stangard deviations on both sides of the mean we must expand the mean by Z. stay rd deviations on both sides of the d) Since any normal distribution can be standardized we can get the value z from the e) All of the above are true when constructing a confidence interval for a population Standard Normal Table mean Save

Explanation / Answer

Ans:

1)Option c is not true,as we use z*sampling standard deviation or standard error of mean

2)confidence interval is calculated as:

sample mean+/-critical z value*sampling standard deviation

Option b is correct.

3)

Option a is not part of hypothesis.

Option a is correct.

4)

Option c is correct.

1.645,1.96 and 2.58 because these indicate specific,commonly use confidence levels(90%,95% and 99% respectively)

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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