In a recent year, the average movie ticket cost $7.89. In a random sample of 50 movie tickets from various areas, what is the probability that the mean cost is between $7.00 and $7.50, given that the population standard deviation is $1.39? Use Table E and enter your answer correct to four decimal places.
Added by Iker M.
Close
Step 1
We can then use Show more…
Show all steps
Your feedback will help us improve your experience
Tim Thornhill and 65 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
In recent years, the average movie ticket cost $7.89. In a random sample of 50 movie tickets from various areas, what is the probability that the mean cost exceeds $8.00, given that the population standard deviation is $1.39?
Anna D.
In the second quarter of $2015,$ the average movie ticket cost $\$ 8.61 .$ In a random sample of 50 movie tickets from various areas, what is the probability that the mean cost exceeds $\$ 8.00,$ given that the population standard deviation is $\$ 1.39 ?$
The Normal Distribution
The Central Limit Theorem
Assume the average price for a movie is $8.03. Assume the population standard deviation is $0.55 and that a sample of 40 theaters was randomly selected. Complete parts a through d below. a. Calculate the standard error of the mean. _______ (Round to four decimal places as needed.) b. What is the probability that the sample mean will be less than $8.20? P(x < $8.20) = _____ (Round to four decimal places as needed.) c. What is the probability that the sample mean will be less than $7.98? P(x < $7.98) = _____ (Round to four decimal places as needed.) d. What is the probability that the sample mean will be more than $8.14? P(x > $8.14) = ______ (Round to four decimal places as needed.)
Jason H.
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