MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Out of 500 people sampled, 455 preferred Candidate A. Based on this, estimate what proportion of the voting population (p) prefers Candidate A.
Use a 99% confidence level, and give your answers as decimals, to three places.
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- I would like to esCmate the proporCon of adults who own a pet. How many people should I poll in order to be 94% confident that I am within 2% of the actual proporCon?arrow_forwardAccording to a polling organization, 22% of adults in a large region consider themselves to be liberal. A survey asked 200 respondents to disclose their political philosophy: Conservative, Liberal, Moderate. Treat the results of the survey as a random sample of adults in this region. Do the survey results suggest the proportion is higher than that reported by the polling organization? Use an a = 0.01 level of significance. E Click the icon to view the survey results. Because npo (1- Po) =| > 10; the sample size is less than 5% of the population size, and the sample is given to be random, the requirements for testing the hypothesis satisfied. are (Round to one decimal place as needed.)arrow_forwardA public opinion pollster wants to estimate the percentage of voters who favor an upcoming proposal. How many voters must be surveyed to construct a 95% confidence interval for the percentage of voters who favor the proposal within 3 percentage points? Remember, sample size must be a whole number.arrow_forward
- I AM RESUBMITTING THIS QUESTION FOR DIFFERENT PARTS. I NEED THE LAST 3 MULTIPLE CHOICE QUESTIONS ANSWERED. 5, 6, AND 7 Before the furniture store began its ad campaign, it averaged 160 customers per day. The manager is investigating if the average has changed since the ad came out. The data for the 16 randomly selected days since the ad campaign began is shown below: 131, 127, 148, 143, 141, 153, 158, 145, 138, 163, 164, 148, 166, 154, 170, 133 Assuming that the distribution is normal, what can be concluded at the αα = 0.05 level of significance? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion The null and alternative hypotheses would be: H0:H0: ? μ p Select an answer < = ≠ > H1:H1: ? p μ Select an answer = > ≠ < The test statistic ? t z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is ? ≤ > αα Based…arrow_forwardA poll of 1000 voters has Biden leading by 538 to 462. What will the pollster indicate as the "margin of error"?arrow_forwardA study was conducted of pleas made by 1,025 criminals. Among those criminals, 953 pled guilty, and 395 of them were sentenced to prison. Among the 72 other criminals, who pled not guilty, 59 were sent to prison. Complete (a) through (d). a. What percentage of the criminals pled guilty? % (Round to the nearest tenth as needed.) b. What percentage of the criminals were sent to prison? % (Round to the nearest tenth as needed.) c. Among those who pled guilty, what is the percentage who were sent to prison? % (Round to the nearest tenth as needed.) d. Among those who pled not guilty, what is the percentage who were sent to prison? % (Round to the nearest tenth as needed.) ←arrow_forward
- A coach gave her team a test on sit-ups completed in one minute. Using the data collected, the coach constructed the following frequency distribution: Scores 90-99 80-89 70-79 60-69 50-59 40-49 30-39 20-29 10-19 0-9 1 4 9 21227 13 10 3 1 101 schem 2.0 and niniw elled beimcheq pritzen 19wol oarrow_forward374 is 22% of the sample size. Find narrow_forwardQ7arrow_forward
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