who believes they voted thw winning candidate ise B) here is sumcient evilenue t

Question

who believes they voted thw winning candidate ise B) here is sumcient evilenue to warrant hat they voted for the winni to 43% Problem 3 15 grams, inin a lemoglobin Researchers claim that the average hemoglobin reading is deviation sample of a 20 teacher the average hemoglobin reading was IN grams with a standard is 2.5 grams A. the appropriate hypotheses to test are: Hot IS ma is B. If she wants to be 99% confident in her decision. what rejection region should she use? check ta de 2,3 Find the standard error

Explanation / Answer

First thing to note is that the standard deviation provided is the sample standard deviation and not the population standard deviation. Since the population standard deviation is not known, t test needs to used.

Given data, X = 18, µ = 15, n = 20, s = 2.5

Hypothesis is fine.

b) degree of freedom, df = n-1 = 19. This is a two sided t test for a single sample. tcrit = +/- 2.8609

c) standard error, SE = s/sqrt(n) = 2.5/sqrt(20) = 0.5590

d) t = (18-15)/0.5590 = 5.367

e) t > tcrit , therefore reject null hypothesis and there is sufficient evidence to suggest that the haemoglobin level is different from 15 grams

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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