The paint used to make lines on roads must reflect enough light to be clearly vi

Question

The paint used to make lines on roads must reflect enough light to be clearly visible at night. Let denote the true average reflectometer reading for a new type of paint under consideration. A test of Ho: = 20 versus Ha: 20 will be based on a random sample of size n from a normal population distribution. hat conclusion is appropriate in each of the following situations? (Round your P-values to three decimal places.) (a) n = 19, t = 3.3, = 0.05 P-value= .002 State the conclusion in the problem context. Do not reject the null hypothesis. There is sufficient evidence to conclude that the new paint has a reflect meter reading igher than 20 Reject the null hypothesis. There is not sufficient evidence to concluce that the new paint has a renecton eter reading higher than 20. e Reject the null hypothesis. There is sufficient evidence to conclude that the new paint has a reflectometer reading higher than 20 Do not reject the null hypothesis. There is not sufficient evidence to conclude that the new paint has a reflectometer reading higher than 20 0.01 (b) n 10, t= 1.8, P-value053 State the conclusion in the problerm context. Do not reject the null hypothesis. There is sufficient evidence to conclude that the new paint has a reflectometer reading higher than 20. Reject the null hypothesis. There is not sufficiernt evidence to conclude that the new paint has a reflectometer reading higher than 20. Reject the null hypothesis. There is sufficient evidence to conclude that the new paint has a reflectometer reading higner than 20 Do not reject the null hypothesis. There is not sufficient evidence to conclude that the new paint has a reflectometer reading higher than 20 (c) n= 30, t=-0.2 P-value421

Explanation / Answer

c) Degrees of freedom = n - 1 = 30 - 1 = 29

Hence,

p - Value = P(t > -0.2) = 0.579

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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