A distribution of values is normal with a mean of 87.3 and a standard deviation of 29.2. Find the probability that a randomly selected value is less than 66.9. P(X < 66.9) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z- scores rounded to 3 decimal places are accepted.
Added by Guillermo M.
Close
Step 1
9 using the formula: z = (x - μ) / σ where x = 66.9, μ = 87.3, and σ = 29.2 Calculating the z-score: z = (66.9 - 87.3) / 29.2 z = -20.4 / 29.2 z = -0.6986 Show more…
Show all steps
Your feedback will help us improve your experience
Pritesh Ranjan and 68 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 distribution of values is normal with a mean of 115.6 and a standard deviation of 51.7. Find the probability that a randomly selected value is between -49.8 and -44.7. P(-49.8 < X < -44.7) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Carly S.
A distribution of values is normal with a mean of 122.3 and a standard deviation of 37.6. Find the probability that a randomly selected value is greater than 69.7. P(X > 69.7) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Ahmet Y.
A distribution of values is normal with a mean of 151.3 and a standard deviation of 98. Find the probability that a randomly selected value is less than 72.9. P(X < 72.9) = Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD