![ujusdied5176](/avatars/5563.jpg)
ujusdied5176
11.11.2019 •
Mathematics
Astudy was conducted in order to estimate ? , the mean number of weekly hours that u.s. adults use computers at home. suppose a random sample of 81 u.s. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard deviation is assumed to be ? = 3.6 hours.based on this information, what would be the point estimate for ) 81(b) 8.5(c) 3.6(d) none of the above.we are 95% confident that the mean number of weekly hours that u.s. adults use computers at home is: (a) between 8.1 and 8.9.(b) between 7.8 and 9.2.(c) between 7.7 and 9.3.(d) between 7.5 and 9.5.(e) between 7.3 and 9.7.which of the following will provide a more informative (i.e., narrower) confidence interval than the one in problem 3? (a) using a sample of size 400 (instead of ) using a sample of size 36 (instead of ) using a different sample of size 81.(d) using a 90% level of confidence (instead of 95%) using a 99% level of confidence (instead of 95%) both (a) and (d) are correct.(g) both (a) and (e) are correct.how large a sample of u.s. adults is needed in order to estimate ? with a 95% confidence interval of length 1.2 hours? (a) 6(b) 12(c) 20(d) 36(e) 144
Solved
Show answers
More tips
- S Science and Technology How to choose a home theater system?...
- H Health and Medicine Discover the Hidden Principles and Real Results of the Japanese Diet...
- C Computers and Internet Google Search Tips and Tricks: Everything You Need to Know...
- F Food and Cooking Experts Name Top 5 Healthiest Teas...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- F Food and Cooking How many stages of coffee roasting are there?...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
Answers on questions: Mathematics
- M Mathematics George, Matthew and Isabelle invest money in a savings account, which pays compound interest of 3% pa (a) George invested £4800, Work out the total value of his investment...
- E English Humans can become conditioned to pair certain food flavors with certain events. select the best answer from the choices provided true false...
- B Biology Are mannose and galactose, allose and altrose, gulose and talose, and ribose and arabinose diastereoisomers? consider only d-sugars. match the words in the left column...
- C Chemistry Ming Lee set-up her experiment and begin to list everything she did step by step. By the time Ming Lee finished her list, she had recorded 21 steps altogether. Step...
- M Mathematics The vertices of square hijk have coordinates h(−3, 2), i(−5, 2), j(−5, 4), and k(−3, 4). square hijk was transformed to produce square hꞌiꞌjꞌkꞌ, with coordinates...
- E English Which statement is written in conditional mood? a. if he hurries, he can make the train. b. i had hoped that the song i wrote would be a hit. c. go turn off the sprinklers...
Ответ: