EBook Problems Distrib MeanVar

EBook Problems Set - Expectation (Mean) and Variance

Problem 1

Ming’s Seafood Shop stocks live lobsters. Ming pays $6.00 for each lobster and sells each one for $12.00. The demand X for these lobsters in a given day has the following probability mass function.

X	0	1	2	3	4	5
P(x)	0.05	0.15	0.30	0.20	0.20	0.1

What is the Expected Demand?

• Choose one answer.

(a) 13.5

(b) 3.1

(c) 2.65

(d) 5.2

Answer

 (c)

Problem 2

If sampling distributions of sample means are examined for samples of size 1, 5, 10, 16 and 50, you will notice that as sample size increases, the shape of the sampling distribution appears more like that of the:

• Choose one answer.

(a) normal distribution

(b) uniform distribution

(c) population distribution

(d) binomial distribution

Answer

 (a)

---

• Back to Ebook
• SOCR Home page: http://www.socr.ucla.edu

---

---

Translate this page:

(default)	Deutsch	Español	Français	Italiano	Português	日本語	България	الامارات العربية المتحدة	Suomi	इस भाषा में	Norge
한국어	中文	繁体中文	Русский	Nederlands	Ελληνικά	Hrvatska	Česká republika	Danmark	Polska	România	Sverige