« previous next »

Author Question: Whenever the population standard deviation is unknown, which distribution is used in developing an ... (Read 70 times)

RODY.ELKHALIL

  • Hero Member
  • *****
  • Posts: 591
on: Jun 24, 2018
Whenever the population standard deviation is unknown, which distribution is used in developing an interval estimate for a population mean?
 a. standard distribution
  b. z distribution
  c. binomial distribution
  d. t distribution

Question 2

The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 and a standard deviation of 5,000 miles. What is the probability that a randomly selected tire will have a life of exactly 47,500 miles?
 a. .4332
  b. .9332
  c. .0668
  d. 0


triiciiaa

  • Sr. Member
  • ****
  • Posts: 349
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Three ways that factors affect mortality in response to changes in population density. Three ways that factors affect mortality in response to changes in population density.
The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de
The spatial distribution of trees in three separate stands of different ages on Vancouver Island (da The spatial distribution of trees in three separate stands of different ages on Vancouver Island (da
Standard Precautions for the Care of all Patients in All Health Care Settings Standard Precautions for the Care of all Patients in All Health Care Settings
Share of Human Capital in Wages in Developing Countries Share of Human Capital in Wages in Developing Countries
The threshold model explains the discontinuous distribution of some multifactorial traits. In this m The threshold model explains the discontinuous distribution of some multifactorial traits. In this m
Video: Heart Chambers

For a complete list of videos, visit our video library