00000Chalkduster07+lab+11015lılı@27%Part 2. Estimating Population Parameters3. In a Harris poll of 2036 adults, 40% said that they prefer to get their news online. Construct a 95%confidence interval estimate of the percentage of adults who say that they prefer to get their newsonline. Can we safely say that fewer than 50% of adults prefer to get their news online?4. The LA times printed the headline "Most California Voters Support Legalizing Recreational Marijuana."That headline was based on a survey of 1879 Californians, with 1090 of them supporting Proposition 64(which passed during the November 2016 election and opened up the state for legal cannabis salesstarting in 2018). Use the survey results to construct a 95% confidence interval estimate for thepercentage of Californians who support legalization of recreational marijuana. Is the claim in the headlinesupported by the poll findings?X

3) Sample size n=2036 Sample proportion p^=0.40 NOTE: Hi there! Thanks for posting the…

Answered: 3. In a Harris poll of 2036 adults, 40%…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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9. A researcher wants to construct a 99% confidence interval for the proportion of Americans who think that the U.S. invading Iraq was an effective step in combating world terrorism. She has no initial idea of what that proportion is. How large should her sample size be if she wants the margin of error to be at most two percent? Show or explain your thinking.
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Fear of the dark is quite common among children. However, what about adults? One polling agency released the results of a survey that asked people over 30 years old if they keep the lights on at night. Among 452 respondents, 34% indeed leave the light on when going to sleep. What does this margin of error tell you about the percentage of adults who keep the lights on at night? We can be 95% confident that somewhere between % and % of adults keep the lights on at night.
10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p (1) versus H1: p (2) (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion? O A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' att O B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient…
Suppose you construct a 90% confidence interval for the true population mean GPA of students at Taft College. If all of the sample values remained constant and you decreased the confidence level, what would happen to the width of your confidence interval? Edit View Incort
9. According to a poll, eighty seven percent (87%) of California adults (440 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a ninety percent (90%) confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?
In a recent survey of 1264 US adults, 26.6% said they had seen a ghost. What is the LOWER endpoint of a 98% confidence interval for the population proportion? What is the UPPER endpoint of a 98% confidence interval for the population proportion? Answers should be decimals (not percentages).
if a 95% confidence intervalgivess 0.20 and 0.27, can we be 95% that the proportion is 22% accurate or not because not all values are within 22%?

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3. In a Harris poll of 2036 adults, 40% said that they prefer to get their news online. Construct a 95% confidence interval estimate of the percentage of adults who say that they prefer to get their news online. Can we safely say that fewer than 50% of adults prefer to get their news online?