Solution Found!

Statistics / Elementary Statistics: A Step by Step Approach 8th ed. 8 / Chapter 6-2 / Problem 24

Elementary Statistics: A Step by Step Approach 8th ed. | 8th Edition | ISBN: 9780073386102 | Authors: Allan G Bluman Professor Emeritus

Change Question

Ages of Amtrak Passenger Cars The average age of Amtrak

Chapter 6, Problem 24

(choose chapter or problem)

Get Unlimited Answers

QUESTION:

Ages of Amtrak Passenger Cars The average age of Amtrak passenger train cars is 19.4 years. If the distribution of ages is normal and 20% of the cars are older than 22.8 years, find the standard deviation. 4.05 Source: New York Times Almanac.

Questions & Answers

QUESTION:

Ages of Amtrak Passenger Cars The average age of Amtrak passenger train cars is 19.4 years. If the distribution of ages is normal and 20% of the cars are older than 22.8 years, find the standard deviation. 4.05 Source: New York Times Almanac.

ANSWER:

Step 1 of 3

Given:

The highest have of the data values below its cutoff value.

Determine the z-score corresponding to a probability of or in table :

Study Tools You Might Need

Chapter: 1 Problem: 1.1

Microbiology: An Introduction 11
How are bacteria, archaea, fungi, protozoa, algae, and viruses distinguished on the basis of cellular structure?

Chapter: 5 Problem: 5.55

Elementary Principles of Chemical Processes 3
The measured volumetric flow rate of ethane at 10.0 atm absolute and 35C is 1.00 X 103 Llh. Using an estimated value of the second virial coefficient in the truncated virial equation (Equation 5.3-4), (a) calculate V(Llmol); (b) estimate the compressibility factor, Z; and (c) determine the mass flow

Chapter: Problem: 35

Chemistry 7
In each of the following groups of substances, pick the one that has the given property. Justify your answer. a. highest boiling point: HBr, Kr, or Cl2 b. highest freezing point: H2O, NaCl, or HF c. lowest vapor pressure at C: Cl2, Br2, or I2 d. lowest freezing point: N2, CO, or CO2 e. lowest boiling

Chapter: 0 Problem: 1

Living by Chemistry 2
How can chemical names and symbols help you fi gure out what copper compound was made in each step of the copper cycle? Give an example.

Chapter: 3 Problem: 1

Biology: The Dynamic Science 4
What is the monomer of a nucleic acid macromolecule?

Chapter: 4 Problem: 8

Urban Economics 8
Specialized Services in Large Cities Complete the statement: Large urban areas provide specialized cultural, legal, edical, fi nancial, and other services that are not available in small urban areas because these specialized services are characterized by. . . .

Chapter: 2 Problem: 6

Introduction to Psychology 10
Does Binge Drinking Cause Later Health Problems? It is well known that adolescent drinking causes plenty of immediate health problems such as sleeplessness, fatigue, headaches, and lower cognitive functioning. But does adolescent binge drinking (having at least five alcoholic drinks on one occasio

Chapter: 1 Problem: 16

Advanced Engineering Mathematics 10
CAS PROJECT. Direction Fields. Discuss direction fields as follows. (a) Graph portions of the direction field of the ODE (2) (see Fig. 7), for instance, \(-5 \leqq x \leqq 2,-1 \leqq y \leqq 5\). Explain what you have gained by this enlargement of the portion of the field. (b) Using implicit di

Not The Solution You Need? Search for Your Answer Here:

×

Login

Login or Sign up for access to all of our study tools and educational content!

×

Register

Sign up for access to all content on our site!

Or login if you already have an account