Learning Materials
Features
Discover
Chapter 7: Q. 5 (page 462)
Suppose we roll a fair die four times. The probability that a occurs on exactly one of the rolls is
(a)
(b)
(c)
(d)
(e)
The probability that a occurs on exactly one of the rolls is option (c) .
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
According to the U.S. census, the proportion of adults in a certain county who owned their own home was . An SRS of adults in a certain section of the county found that owned their home. Which one
of the following represents the approximate probability of obtaining a sample of adults in which fewer than own their home, assuming that this section of the county has the same overall proportion of adults who own their home as does the entire county?
(a)
(b)
(c)
(d)
(e)
How tall? A random sample of female college students has a mean height of inches, which is greater than the -inch mean height of all adult American women.
In the language of government statistics, you are “in the labor force” if you are available for work and either working or actively seeking work. The unemployment rate is the proportion of the labor force (not of the entire population) who are unemployed. Here are data from the Current Population Survey for the civilian population aged years and over in a recent year. The table entries are counted by thousands of people.
Unemployment () Find the unemployment rate for people with each level of education. How does the unemployment rate change with education?
The histogram above left shows the intervals (in minutes) between eruptions of the Old Faithful geyser for all recorded eruptions during a particular month. For this population, the median is minutes. We used Fathom software to take SRSs of size from the population. The values of the sample median are displayed in the histogram above right. The mean of the sample median values is .
Suppose we had taken samples of size instead of size . Would the spread of the sampling distribution be larger, smaller, or about the same? Justify your answer
Social scientists are interested in the association between the high school graduation rate (HSGR) and the percentage of U.S. families living in poverty (POV). Data were collected from all states and the District of Columbia, and a regression analysis was conducted. The resulting least-squares regression line is given by (HSGR) with . Based on the information, which of the following is the best interpretation for the slope of the least-squares regression line?
(a) For each increase in the graduation rate, the per cent of families living in poverty is predicted to decrease by approximately .
(b) For each increase in the graduation rate, the per cent of families living in poverty is predicted to decrease by approximately .
(c) For each increase in the graduation rate, the per cent of families living in poverty is predicted to decrease by approximately .
(d) For eachincrease in the percentage of families living in poverty, the graduation rate is predicted to increase by approximately .
(e) For each increase in the per cent of families living in poverty, the graduation rate is predicted to decrease by approximately.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App