A student's grade on an examination was transformed to a z value of 0.83. Assuming a normal distribution, we know that she scored approximately in the top Question 6 options: 40 percent. 20 percent. 15 percent. 25 percent.
Added by Zoe D.
Step 1
A z-value indicates how many standard deviations a data point is from the mean of a normal distribution. A z-value of 0.83 means the student's score is 0.83 standard deviations above the mean. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Pritesh Ranjan and 90 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
A student’s grade on an examination was transformed to a z value of 0.81. Assuming a normal distribution, we know that she scored approximately in the top
Pritesh R.
PART II: Find probabilities using a normal distribution for the given scenario: Q 6: A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 8. a. What is the probability that a student scored below 85 on this exam? b. What is the probability that a student scored between 70 and 90? c. The probability is 8% that a student taking the test scores higher than what grade? d. If the professor grades on a curve (i.e., gives A's to the top 10% of the class, regardless of the score), are you better off with a grade of 84 on this exam or a grade of 68 on a different exam, where the mean is 62 and the standard deviation is 3? Show your answer statistically and explain. (You are allowed to use a standard normal z table and attach your table with the answer sheet)
Adi S.
Lien L.
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