Learning Materials
Features
Discover
Chapter 7: Q.20 (page 428)
Find the sum with a –score of .
The sum with ascore ofis.
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
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about and a standard deviation of about ten. Suppose that individuals are randomly chosen. Let role="math" localid="1648361500255" average percent of fat calories.
a. _____ (______, ______)
b. For the group of , find the probability that the average percent of fat calories consumed is more than five. Graph the situation and shade in the area to be determined.
c. Find the first quartile for the average percent of fat calories.
Suppose that it is past noon on a delivery day, The probability that a person must wait at least one and half more hours is;
a.
b.
c.
d.
What is ?
82. Would you be surprised, based upon numerical calculations, if the sample average wait time (in minutes) for 100 riders was less than 30 minutes?
a. yes
b. no
c. There is not enough information.
The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A sample of 64 of these smartphones is taken.
What is the distribution for the mean length of time 64 batteries last?
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