The average class size this semester in the business school of a particular university is 38.1 students with a standard deviation of 12.9 students. The z-score for a class with 21 students is the closest to
Added by Magdalena W.
Step 1
1 \), and \( \sigma = 12.9 \). Show more…
Show all steps
Close
Your feedback will help us improve your experience
Joanna Quigley and 78 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
Madhur L.
. The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of 3.05 and a standard deviation of .28. Find the probability that the mean GPA of a random sample of 20 students selected from this university is 3.12 or higher.
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 21.3 and the standard deviation was 5.5. The test scores of four students selected at random are 14, 23, 9, and 36. Find the z-scores that correspond to each value and determine whether any of the values are unusual.
Suman K.
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