zitterkoph
15.04.2020 •
Mathematics
The National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth‑grade students. Scores on the test range from 0 0 to 500 500 . Demonstrating the ability to use the mean to solve a problem is an example of the skills and knowledge associated with performance at the Basic level. An example of the knowledge and skills associated with the Proficient level is being able to read and interpret a stem‑and‑leaf plot. In 2015, 136,900 136,900 eighth‑graders were in the NAEP sample for the mathematics test. The mean mathematics score was ¯ x = 282 x¯=282 . We want to estimate the mean score μ μ in the population of all eighth‑graders. Consider the NAEP sample as an SRS from a Normal population with standard deviation σ = 110 σ=110 . (a) If we take many samples, the sample mean ¯ x x¯ varies from sample to sample according to a Normal distribution with mean equal to the unknown mean score μ μ in the population. What is the standard deviation of this sampling distribution? (Enter your answer rounded to four decimal places.) standard deviation = (b) According to the 95 95 part of the 68 ‑ 95 ‑ 99.7 68‑95‑99.7 rule, 95 % 95% of all values of ¯ x x¯ fall within how many points on either side of the unknown mean μ μ ? (Enter your answer rounded to four decimal places.) points = (c) What is the 95 % 95% confidence interval for the population mean score μ μ based on this one sample? (Enter your answer rounded to one decimal place.) Lower value = Higher value =
Solved
Show answers
More tips
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Animals and plants How ants survive winter: exploring the secrets of their winter life...
- F Food and Cooking Discover How to Properly Prepare Dough for Rasstegai...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
Answers on questions: Mathematics
- M Mathematics Please help me answer this Explain you’re answer Will give braisnlt...
- M Mathematics How can you use the area model to rewrite a quadratic expression in order to reveal its factors and zeros?...
- M Mathematics Tray has $50 and receives $8 a week for allowance. He wants to save all of his money to buy a new mountain bike that costs $499. Write an arithmetic sequence to represent...
- M Mathematics Find the sum. Write the sum as a mixed number, so the fractional part is less than 1. 4 1/2 + 2 1/2 (I got 6 2/2 and i need to make the 6 a 1 because 2/2 is one whole....
- M Mathematics Please help me answer this Explain you’re answer Will give braisnlt...
- M Mathematics Find the coordinates of the point 13 of the way from A to B....
- M Mathematics Please help me answer this Explain you’re answer Will give braisnlt...
- M Mathematics What is the average rate of change for the function over the interval from x = -2 to x = 2?...
- M Mathematics Abaseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. how tall is the building?...
- M Mathematics Lydia bought a shirt at 20% off it’s retail price of $40. she paid 5% tax on the price after the discount. how much did lydia pay for the shirt?...
Ответ:
idk how i got that bcuz i do it mentally but i'm pretty sure its right