Question
upstudy study bank question image url

A standardized test has a mean score of 100 and a standard deviation of 15 . What z-scores correspond to: (Do not round-off answers) A. A score of 85 ? B. A score of 115 ? C. A score of 130 ?

Ask by Ramos Lynch. in Jamaica
Mar 13,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

The z-scores are: - 85: -1 - 115: 1 - 130: 2

Solution

Sign in to Unlock Answers for Free!

A Learning Platform Trusted by Millions of Real Students and Teachers.

star-icon Unlock

Answered by UpStudy AI and reviewed by a Professional Tutor

Beyond the Answer

To find the z-scores for the given scores, you can use the formula: z = (X - μ) / σ where X is the score, μ is the mean, and σ is the standard deviation. A. For a score of 85: z = (85 - 100) / 15 = -1. B. For a score of 115: z = (115 - 100) / 15 = 1. C. For a score of 130: z = (130 - 100) / 15 ≈ 2. So the z-scores are -1 for 85, 1 for 115, and approximately 2 for 130.

Related Questions

Latest Statistics Questions

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy