The scaled test scores for the New York State Grade 4 Common Core English Language Arts Test are normally distributed. The normal curve shown below represents this distribution. What is the mean test score? Estimate the standard deviation of this normal distribution. (Adapted from New York State Education Department) English Language Arts Test Scaled test score
Added by Thomas M.
Close
Step 1
The mean is located at the center of the normal curve. From the graph, the mean test score is at the peak of the curve, which is approximately 300. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 94 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The scaled test scores for the New York State Grade 8 Mathematics Test are normally distributed (and represented in the graph). Find the mean score: Scaled test score 700 0 675 650
Qudsiya A.
The scores on a standardized mathematics test for 8th grade children in New York State from a normal distribution with a mean of ?= 100 and a standard deviation of ?= 10. If the sample of n= 4 are selected from the population, what proportion of the samples will have means less than M= 75? P(M < 75)?
Ahmet Y.
Adi S.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD