MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- A survey asked 1578 US residents: “Do you think the use of marijuana should be made legal, or not?”. 61% of respondents said it should be made legal. A newscaster said of this story that “a majority of Americans think marijuana should be legalized”. Use hypothesis testing to see if this newscaster’s statement is justified.arrow_forwardThe mean entry-level salary for an employee at a company is $40,000. You believe it is lower for entry-level IT professionals in the company.1. Identify the null hypothesis. 2. Identify the alternative hypothesis. 3. Identify the type I error. A. You decide that the mean entry-level salary for IT professionals is $40,000, when, in actuality, the mean entry-level salary for IT professionals is $40,000. B. You decide that the mean entry-level salary for IT professionals is $40,000, when, in actuality, the mean entry-level salary for IT professionals is lower than $40,000. C. You decide that the mean entry-level salary for IT professionals is lower than $40,000, when, in actuality, the mean entry-level salary for IT professionals is $40,000. D. You decide that the mean entry-level salary for IT professionals is lower than $40,000, when, in actuality, the mean entry-level salary for IT professionals is lower than $40,000. 4. Identify the type II error. A. You decide that…arrow_forwardI would like to know is my calculated answer correctarrow_forward
- Consumers Energy states that the average electric bill across the state is $51.28. You want to test the claim that the average bill amount is actually different from $51.28. What are the appropriate hypotheses for this test?arrow_forwardIn 2011, a U.S. Census report determined that 52% of college students are working students. A researcher thinks this percentage has changed and surveys 182 college students. The researcher reports that 106 of the 182 are working students. Is there evidence to support the researcher's claim at the 1% significance level? a. Determine the null and alternative hypotheses. Ho:p = H1: p ?V (Select the correct symbol and enter the value.) b. Determine the test statistic. Round to two decimal places. c. Find the p - value. Round to four decimal places. p- value = d. Are the results statistically significant? O Fail to reject the null hypothesis. O Reject the null hypothesis. e. Write the conclusion. O There is not sufficient evidence to support the claim that the percentage of working college students has changed. O There is sufficient evidence to support the claim that the percentage of working college students has changed.arrow_forwardStay safe and healthy. Exercise: Apply the procedure in testing the hypothesis. A survey was conducted at a community college of 102 randomly selected students who dropped a course in the current semester to learn why students drop courses. Personal drop reasons include financial, transportation, family issues, health issues, and lack of child care. Course drop reasons include reducing ones load, being unprepared for the course, the course was not what was expected, dissatisfaction with teaching, and not getting the desired grade. Work drop reasons include an increase in hours, a change in shift, and obtaining full-time employment. Test whether gender is independent of drop reason at the 1% level of significance. Use "Data_Example and Exercises file". SLIDESMANIA.COM Dec 8, 2021 (Edited Dec 8, 2021) Result ACTUAL/OBSERVED Count of Drop Reason Column Labels - Career Row Labels Course Institution Personal Work Grand Total Female 10 12 18 6 11 57 Male 11 9 6 12 46 Grand Total 21 21 26 12…arrow_forward
- need help with Carrow_forwardA news article that you read stated that 59% of voters prefer the Democratic candidate. You think that the actual percent is different. 120 of the 236 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?Select an answerv (please enter a decimal) H.:?Select an answerv (Please enter a decimal) c. The test statistic ?V = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?va f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population proportion is not significantly different 59% at a = 0.05, so there is not sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is different 59%. O The data suggest the…arrow_forwardWhat are the correct answers?arrow_forward
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