This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Find the requested probability for the standard normal random variable Z. What is the probability ... (Read 104 times)

JGIBBSON

  • Hero Member
  • *****
  • Posts: 538
on: Jul 24, 2018
Find the requested probability for the standard normal random variable Z. What is the probability that Z is between -1.2 and 1.45, P(-1.2  Z  1.45)?
 a. 0.0303
  b. 0.7740
  c. 0.8041
  d. 0.8114

Question 2

In a past General Social Survey, a random sample of respondents answered the question Are you a member of any sports groups? Based on the sample data, 95 confidence intervals for the population proportion who would answer yes are 0.215 to 0.365 for people 18 to 23 years old and 0.247 to 0.333 for people 24 to 29 years old. Based on these results, you can reasonably conclude that
 a. at least 40 of people aged 18 to 23 years old and people aged 24 to 29 years old belong to sports clubs.
  b. there is no conclusive evidence of a difference between the two age groups in the proportions of people belonging to sports clubs.
  c. there is conclusive evidence of a difference between the two age groups in the proportions of people belonging to sports clubs.
  d. None of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chjcharjto14

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

B


JGIBBSON

  • Hero Member
  • *****
  • Posts: 538
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


chjcharjto14

  • Sr. Member
  • ****
  • Posts: 342
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

The FDA recognizes 118 routes of administration.

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%).

Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d
How to find the critical numbers of a function How to find the critical numbers of a function
How to find the domain of a function (Part 3) How to find the domain of a function (Part 3)
Standard reduction potentials of the major respiratory electron carriers Standard reduction potentials of the major respiratory electron carriers
Normal Red Blood Cells Normal Red Blood Cells
Normal conduction pathway in the heart Normal conduction pathway in the heart
Video: baroreceptors

For a complete list of videos, visit our video library