2. Statistical Abstracts (117th edition) provides information aboutthe number of

Question

2. Statistical Abstracts (117th edition) provides information aboutthe number of
registered automobiles, including taxis, by state. The number ofregistered
automobiles per 1,000 residents follows an approximately normaldistribution with
mean m = 514.6 and standard deviation s = 84.6. In the questionsbelow, x =
number of registered automobiles per 1,000 residents.

(a) Find the probability that for a random sample of 4 statesthe sample mean, x
is between 475 and 525.
(b) Find the probability that for a random sample of 16states the sample mean,
x is between 475 and 525.
(c) Compare your answers for parts (a) and (b) and give a reason for the
difference.

Explanation / Answer

Given xbar=514.6, s=84.6 (a) Find the probability that for a random sample of 4 statesthe sample mean, x is between 475 and 525. P(475

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

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