Logo
Home Study Material Contact Search
AI Chat FREE
  1. business
  2. general management
  3. iq scores in a large population have a normal dist

IQ scores in a large population have a normal distribution with mean=100 and standard deviation=15. What...

60.1K

Verified Solution

Question

General Management

IQ scores in a large population have a normaldistribution with mean=100 and standard deviation=15. What is theprobability the sample mean for n=2 will be 121 or higher?

(I understand the z score equals 1.98,could you pleaseexplain to me how the final answer is equal to0.0239?thanks.)
Also, why do we use 1 and subtract 0.9761 to get 0.0239? Where does0.9761 come from?

Answer & Explanation Solved by verified expert
3.9 Ratings (456 Votes)
It appears that you have already done the calculation for the zvalue So I will skip that part I will tell you the scenarios onwhich you should use which table and how to calculate theprobability from z valueIn this case the distribution increases from left to right Thismeans consider a normal distribution chart like the one shownbelow Left hand side of the curve will begin from 0 and willeventually move to the highest level Now keep in mind that thenormal distribution is usually an infinite chart However weusually represent it within 3 standard    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

A random sample of 42 textbooks has a mean price of $114.50 and a standard deviation...

Statistics
Q

A 12.0 % NaCl(aq) has a density of 1.05 g/mL. What is the molality of the...

Chemistry
Q

Diagram and describe the oxidative energy system. Be detailed in where the various steps in the...

Medical Sciences
Q

Watch help video It cost Adam 5 04 to send 84 text messages How much...

Basic Math
Q

TABLE OF INDEFINITE INTEGRALS fcf x dx cff x dx fkdx dx kx C fxndx...

Calculus
Q

Ryan has scored 95 67 and 66 on his previous three tests What score does...

Algebra
Q

ht each kilogram of a person s weight 20 milligrams of a drug is to...

Algebra
Q

CPA Question 01 On September 1, 2017, Hyde Corp., a newly formed company, had the...

Accounting
Q

Marrin Corporation makes three products that use the current constraint-a particular type of machine....

Accounting
Q

The Payroll Manager, Melissa Ranson, has requested that you prepare a memo explaining what a...

Accounting
Q

Given the following account information for Leong Corporation, prepare a balance sheet in report form...

Accounting
Q

Part 2 (25 marks) Risk and return You are considering an investment in the stock...

Finance