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Chapter 11: Q.11.4 (page 459)

Regarding a population proportion:

a. What is it ?

b. What symbol is used for it?

Short Answer

Expert verified

(a) A population proportion is a statistical measure based on all units in the population or a quantifiable property of the population.

(b) The Greek letter π(pi) is widely used as a sign representing population proportion.

Step by step solution

01

Part (a) Step 1: Given information

Given in the question that, We need to find that what is population proportion .

02

Part(a) Step 2: Explanation

Population proportion: A population proportion is a statistical measure based on all units in the population or a quantifiable property of the population.

The population proportion is the percentage of the total population that has a particular attribute.

03

Part (b) Step 1: Given information

Given in the question that, We need to find the symbol for population proportion

04

Part(b) Step 2: Explanation

The Greek letterπ (pi) is widely used as a sign representing population proportion.

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Most popular questions from this chapter

Is College Worth It? In the New York Times article "College Graduates Fare Well in Jobs Market, Even Through Recession," C. Rampell noted that college graduates have suffered through the recession and lackluster recovery with remarkable resilience. Of a random sample of 1020 college graduates, 35 were unemployed; and of a random sample of 1008 high-school graduates (no college), 69 were unemployed.

a. At the 1 T significance level, do the data provide sufficient evidence to conclude that college graduates have a lower unemployment rate than high-school graduates?

b. Find and interpret a98% confidence interval for the difference in unemployment rates of college and high-school graduates.

11.99 Of the quantities p1,p2,x1,x2,p^1,p^2, and p^p.
a. which represent parameters and which represent statistics?
b. which are fixed numbers and which are variables?

Obtain a sample size that will ensure a margin of error of at most the one specified.

Margin of error=0.02

Confidence level=95%

Fill in the blanks.

a. The mean of all possible sample proportions is equal to the

b. For large samples, the possible sample proportions have approximately a distribution.

c. A rule of thumb for using a normal distribution to approximate the distribution of all possible sample proportions is that both and are or greater.

What important theorem in statistics implies that, for a large sample size, the possible sample proportions of that size have approximately a normal distribution?
See all solutions

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