A researcher claims that 45% of U.S. adults think that the IRS is not aggressive enough in pursuing wealthy people who cheat on their taxes. You believe the true percentage is more than 45%. To test this, you take a simple random sample of 400 U.S. adults and find that 220 of them say the IRS is not aggressive enough. Test at the 0.01 significance level. Ho:(Select an answer Select an answer HA:(Select an answer Select an answer The sample size is: The value for p to four decimal places is: Test Statistic to two decimal places: P-value to four decimal places: These next two parts go together. Is the result significant? (Select an answer Based on the above we choose to: (Select an answer You may need to make your window wider to see the entire option for each box. There (Select an answer enough evidence to conclude

A researcher claims that 45% of U.S. adults think that the IRS is not aggressive enough in pursuing wealthy people who cheat on their taxes. You believe the true percentage is more than 45%. To test this, you take a simple random sample of 400 U.S. adults and find that 220 of them say the IRS is not aggressive enough. Test at the 0.01 significance level. Ho:(Select an answer Select an answer HA:(Select an answer Select an answer The sample size is: The value for p to four decimal places is: Test Statistic to two decimal places: P-value to four decimal places: These next two parts go together. Is the result significant? (Select an answer Based on the above we choose to: (Select an answer You may need to make your window wider to see the entire option for each box. There (Select an answer enough evidence to conclude

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Description: A researcher claims that 45% of U.S. adults think thatthe IRS is not aggressive enough in pursuing wealthypeople who cheat on their taxes. You believe thetrue percentage is more than 45%. To test this, youtake a simple random sample of 400 U.S. adul

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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Determine if the survey question is biased. If the question is biased, suggest a better wording. How often do you eat vegetables during an average month? Is the question biased? OA. Yes, because it does not lead the respondent to any particular answer. A better question would be "Why is eating vegetables good for you?" OB. Yes, because it influences the respondent into thinking that eating vegetables is good for you. A better question would be "Do you think that eating vegetables is good for you?" OC. No, because it influences the respondent into thinking that eating vegetables is good for you. OD. No, because it does not lead the respondent to any particular answer.
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1079 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample size Groups mean variance Less than h.s. High school Bachelor's 258 40.9 101.8 263 41.8 97.5 270 42.2 94.4 Graduate 288 43.0 98.7 Send data to calculator Send data to Excel To decide if there are any differences in the mean hours per week worked by these different groups, we can perform a one-way, independent-samples ANOVA test. Such a test uses the following statistic. Variation between the samples F= Variation within the samples For the data from…
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 39% of them plan to go into general practice. You wish to conduct a significance test to evaluate the school's claim.
If sample data is such that for a one-tailed test of ? you can reject H0 at the 1% level of significance, can you always reject H0 for a two-tailed test at the same level of significance? Explain your answer? A. Yes. If H0 for a one-tailed test is rejected at the 1% level of significance, it will always be rejected for a two-tailed test at the same level of significance. B. No. If H0 for a one-tailed test is rejected at the 1% level of significance, it will never be rejected for a two-tailed test at the same level of significance. C. Yes. The P-value for the two-tailed test could be greater than 0.01. D. No. The P-value for the two-tailed test could be greater than 0.01.
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
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Is there an association between hair color and body type? The table below shows the results of a researcher's observations of randomly selected people. Frequencies of Hair Colors for Various Body Types Blonde Brunette Red Head 71 80 96 108 55 115 46 91 Short and Slender Short and Pudgy Tall and Slender Tall and Heavy What can be concluded at the o= 0.01 significance level? 53 74 69 63
3. Health officials from DOH who have studied a particular virus say that 50% of all the Filipino people have had the virus. If a random sample of 144 people is taken, what is the mean value? a. 43 b. 57 c. 72 d. 84