Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. the length of time needed to complete a certain te

The length of time needed to complete a certain test is normally distributed with mean 77...

70.2K

Verified Solution

Question

Statistics

The length of time needed to complete a certain test is normallydistributed with mean 77 minutes and standard deviation 11 minutes.Find the probability that it will take between 74 and 80 minutes tocomplete the test.

Answer & Explanation Solved by verified expert
4.1 Ratings (608 Votes)
In Normal distribution first we calculate the z score with thebelow formulaAfter calculating the Z score we look for the z table below toget the probability valueIn the equationWe have mean 77 minutes standard deviation 11 minutes    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

Statistics
1.2K views

A study of arrival times for a number of international flights. The times were randomly recorded...

Chemistry
1.2K views

23. In the following reaction, how many grams of sodium sulfate are needed to react with...

Chemistry
1.2K views

2A. The label on a 1.00-L bottle of wine states that the alcohol content is 12.5%...

Biology
1.2K views

ortrait orientation is also called as O Vertical O Horizontal O Perpendicular

Physics
1.2K views

A satellite with a mass of 125kg is in orbit at a distance of 3.00x106...

Geometry
1.2K views

78 Name 2 At Pizza Pie Heaven a large pizza has a 16 in diameter...

Calculus
1.2K views

Textbook Find the derivative of f x 10x 4z Videos Question Help Video

Calculus
1.2K views

Find the present value of a single future payment of FV 35 000 to be...

Accounting
1.2K views

Bernal y Ruiz son socios que comparten utilidades y prdidas en una proporcin de 3:2,...

Accounting
1.2K views

The Fallston Corporation begins operations in Year One. The company makes credit sales of $1.2...

Accounting
1.2K views

(TCO 6) Tiffany gives her niece a machine to use in her business with a...

Accounting
1.2K views

Managers of cost centers can be held accountable for: Select one: O a. profits O...