A study found that in a random sample of 2000 high school cafeterias, 71% of them serve pizza daily. In a random sample of 2000 college or university cafeterias, 92% of them serve pizza daily. The researchers want to find a 99% confidence interval for the difference between the proportion of high school cafeterias that serve pizza daily, and the proportion of college/university cafeterias that serve pizza daily. What would be the z-score used to find the 99% confidence interval? 0.99 1.96 2.58 1.645
Added by Eugene U.
Close
Step 1
Instead, it is a standard value based on the normal distribution. Show more…
Show all steps
Your feedback will help us improve your experience
Kari Hasz and 50 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
1. For a 84% confidence interval, find Za/2. 2. In a simple random sample of 1500 young Americans, 89% had earned a high school diploma. A. Find the 90% confidence interval for the percentage of all young Americans who earned a high school diploma. B. Interpret the confidence interval.
Dominador T.
In a random sample of 80 Citrus College students, 33 said that they eat pizza at least once per month. Construct a confidence interval for the percentage of all Citrus College students that eat pizza at least once per month. Use a confidence level of 96%. Round the limits of the confidence interval to the nearest tenth of a percent. a) The lower limit of this confidence interval is b) The upper limit of this confidence interval is
Robin C.
Find the z score for an interval with 99% of confidence.
Jen 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