A poll of 1.250 adults in the United States asked how much confidence they had in banks. A total of 196 adults said they had a great deal of confidence. An economist claims that less than 25% of U.S adults have a great deal of confidence in banks. Can you conclude the economist's claim is true? Use 0.05 level of significance. Use P method, list all steps.

A poll of 1.250 adults in the United States asked how much confidence they had in banks. A total of 196 adults said they had a great deal of confidence. An economist claims that less than 25% of U.S adults have a great deal of confidence in banks. Can you conclude the economist's claim is true? Use 0.05 level of significance. Use P method, list all steps.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

please answer all parts
5
A long-term study followed 128 women throughout their lifetime. Among thevarious data collected, one interesting result was that 35 of these women hadsuffered from a migraine at some point in their life Use the results of this study to test the claim that the percentage(proportion) of women in the population that will suffer from a migraine isless than 35% in their lifetime. Use 0.05 significance level. Use symbolsand words to express your answer.
Dogsled drivers, known as mushers, use several different breeds of dogs to pull their sleds. One proponent of Siberian Huskies believes that sleds pulled by Siberian Huskies are faster than sleds pulled by other breeds. He times 4040 teams of Siberian Huskies on a particular short course, and they have a mean time of 7.77.7 minutes. The mean time on the same course for 4747 teams of other breeds of sled dogs is 6.26.2 minutes. Assume that the times on this course have a population standard deviation of 1.51.5 minutes for teams of Siberian Huskies and 1.61.6 minutes for teams of other breeds of sled dogs. Let Population 1 be sleds pulled by Siberian Huskies and let Population 2 be sleds pulled by other breeds. Step 1 of 2 : Construct a 95%95% confidence interval for the true difference between the mean times on this course for teams of Siberian Huskies and teams of other breeds of sled dogs. Round the endpoints of the interval to one decimal place, if necessary.
A poll of 1070 U.S. adults found that 563 U.S. adults, or 52.617% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Express all answers as percentages rounded to 2 decimal places. Do not write the percent sign. Margin of Error (as a percentage): Confidence Interval: Margin of Error (as a percentage): Confidence Interval: Now find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Margin of Error (as a percentage): Confidence Interval: % to O increases O stays roughly the same O decreases % to Finally, find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 99% level of confidence. and the precision of our estimate O decreases O increases O stays roughly the…
in a recent online survey of 1700, students, it was revealed that only17 percent felt the internet was not secure. the degree of confidence where it can be said that 17 % +- 2 % of students believe that online security is secure is closest to? (Don't Hand writing solution)
Please correct woth explanation and dont do handwritten please!!. Please use excel please explain concept also.
During the 2016 season, Lauren Robinson had 92 at bats and made 36 hits. Calculate a 95% confidence interval for her ABILITY to get hits in that season.
Decide if the following statement is true or false and explain your reasoning: Suppose you found a sample proportion p^p^and built a 95% and 99% confidence interval around it. If the the population proportion pp is in actually the 95% confidence interval, then it must also be in the 99% confidence interval.