Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. basic math
  3. 8) what proportion of a normal distribution is loc

8) What proportion of a normal distribution is located between each of the following z-score boundaries? a....

90.2K

Verified Solution

Question

Basic Math

8) What proportion of a normal distribution is located betweeneach of the following z-score boundaries?

a. z = –0.25 and z = +0.25

b. z = –0.67 and z = +0.67

c. z = –1.20 and z = +1.20

13) A normal distribution has a mean of ? = 30 and a standarddeviation of ? = 12. For each of the following scores, indicatewhether the body is to the right or left of the score and find theproportion of the distribution located in the body.

a. X = 33

b. X = 18

c. X = 24

d. X = 39

19) A report in 2010 indicates that Americans between the agesof 8 and 18 spend an average of ? = 7.5 hours per day using somesort of electronic device such as smart phones, computers, ortablets. Assume that the distribution of times is normal with astandard deviation of ? = 2.5 hours and find the followingvalues.

a. What is the probability of selecting an individual who useselectronic devices more than 12 hours a day?

b. What proportion of 8- to 18-year-old Americans spend between5 and 10 hours per day using electronic devices? In symbols, p (5< X < 10) = ?

Answer & Explanation Solved by verified expert
3.7 Ratings (689 Votes)
Solution to    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

In an A-frame house, the twocongruent sides extend from theground to form a 34 angle...

Geometry
Q

Two different genes controlling pod morphology in peas are found on chromosome 5. The narrow pod...

Biology
Q

For a reaction with ΔH∘=−24 kcal/mol and ΔS∘=0.07 kcalmol−1K−1, calculate the equilibrium constant at: (1.) 30...

Chemistry
Q

Public Opinion Polls Campaign Advertising Special Interest

Biology
Q

52 As shown in figure if capacitor of capacitance C is charged by connecting it...

Physics
Q

Kelly invested 5 000 in a CD at Charter Bank The annual rate is 4...

Algebra
Q

Simplify to an expression of the form a sin 8 6 sin 6 cos

Algebra
Q

Why do investors care how the IRS classifies property either as real or personal property...

Accounting
Q

26. Lawncraft, Inc. manufactures woode All direct materials are introduced at the star falt, Inc....

Accounting
Q

lf office supplies expense is INCREASED is the account debited or credited. Debited (dr) Credited...

Accounting
Q

Answer the following questions. (2 marks each) Define the law of demand Explain the...

Accounting
Q

You have been asked to audit the financial statements of Williams Company and report on...

Accounting