Our board of ed wishes to gauge support of local residents for a new property tax valuation levy for the schools, which is being voted on in an upcoming election. They send out a brief survey to a random sample of residents. Let p represent the proportion of residents who support the idea of a property tax levy. How large a sample n would you need to estimate p with margin of error 0.07 with 95% confidence? (Assume that you don't know anything about the value of p.) Work sheet # 3: Show your work for calculating this sample size O 256 O 139 O 196 O 271 O 385 502

Our board of ed wishes to gauge support of local residents for a new property tax valuation levy for the schools, which is being voted on in an upcoming election. They send out a brief survey to a random sample of residents. Let p represent the proportion of residents who support the idea of a property tax levy. How large a sample n would you need to estimate p with margin of error 0.07 with 95% confidence? (Assume that you don't know anything about the value of p.) Work sheet # 3: Show your work for calculating this sample size O 256 O 139 O 196 O 271 O 385 502

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Answer it correctly please. I will rate accordingly with multiple votes. Show full work. Answer only if 100% correct.
Your local school board wants to determine the proportion of people who plan on voting for the school levy in the upcoming election. They conduct a random phone poll, where they contact 150 individuals and ask them whether or not they plan on voting for the levy. Of these 150 respondents, 78 people say they plan on voting for the levy. The school board wants to determine whether or not the data supports the idea that more than 50% of people plan on voting for the levy. Calculate the p-value for the one-sided Hypothesis test described in this example. (Hint: Find the test statistic and then use the tables to find the p-value.) 0.20 < p-value < 0.30 0.6879 0.3121 greater than 0.5 0.4899
Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on the ballot in a large town (voting population over 100,000). An exit poll of 200 voters finds that 106 voted for the referendum. How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.49? Based on your result, comment on the dangers of using exit polling to call elections. How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.49? The probability that more than 106 people voted for the referendum is 0.12890.1289. (Round to four decimal places as needed.)
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 95% confident that the sample percentage is within two percentage points of the true population percentage for all sales transactions. n= (Round up to the nearest integer.)
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Assume that the Controller's office implemented a policy in January 2014 to increase the proportion of part-time city employees in order to cut costs. Suppose that the office had access to the survey conducted by the advocacy group in June 2014 and wanted to use this survey to gauge the effect of this policy on p, the proportion of full-time employees, as of June 2014. If the Controller's office planned to use a one-sample z-test for a proportion to test the effect of their policy, the appropriate null hypothesis would be and the appropriate alternative hypothesis would be In 2014, the U.S. Centers for Disease Control and Prevention reported that 9.3% of Americans had diabetes in 2013. Assume that the Los Angeles Controller's office wanted to determine if the same proportion of the employees of the City of Los Angeles were diabetic. Suppose that they surveyed a random sample of 250 employees in June 2014 and found that 26 were diabetic. If the Controller's office planned to use a…
In a Gallup poll of 1236 adult respondents, 6% said that bad luck follows breaking a mirror. That percentage has a margin of error of 1.5 percentage points. Why is it misleading to state that the percentage is 6% with a margin of error of 1.5%?
Suppose we estimated that 68 percent of Santa Fe students believe that black coffee is disgusting. If we wanted to know the true proportion of the students who share the same view at 99 percent confidence and 4.5 percent margin of error, how many people would we need to sample?
GMU uses a robot food delivery service which now has been utilized in the City of Fairfax. One of the potential benefits of this service is to help the busiest students eat breakfast. Research has shown that about 80% of college students skip breakfast due to busy schedules and other reasons. Initial data were collected from a random sample of 595 Mason students who utilize the robot food delivery service and are presented in StatCrunch. Show the full calculation of the sample proportion by including the number of students who skipped breakfast, the total number of students sampled, and the value of the sample proportion. Present this sample proportion as a decimal rounded to four decimal places. Frequency table results for Breakfast?Count = 595 Breakfast? Frequency Relative Frequency 0 142 0.23865546 1 453 0.76134454
According to previous studies, 12% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handed people in the U.S. is 14%. The student is going to take a random sample of 1650 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handed people in the sample. Answer the following. (If necessary, consult a list of formulas.) ✔ (a) Find the mean of p. P. 0 (b) Find the standard deviation of p. (c) Compute an approximation for P (P<0.14), which is the probability that there will be 14% or fewer left-handed people in the sample. Round your answer to four decimal places. X
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 99% confident that the sample percentage is within two percentage points of the true population percentage for all sales transactions. n = (Round up to the nearest integer.)
Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on the ballot in a large town (voting population over 100,000). An exit poll of 300 voters finds that 147 voted for the referendum. How likely are the results of your sample if the population proportion of voters in the town in favor of the referendum is 0.51? Based on your result, comment on the dangers of using exit polling to call elections.