A researcher claims that a lesser proportion of construction companies in the eastern part use certified lumber in home construction than those in the western part. What are the null and the alternative hypotheses to check this claim

A researcher claims that a lesser proportion of construction companies in the eastern part use certified lumber in home construction than those in the western part. What are the null and the alternative hypotheses to check this claim

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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Are freshmen psychology majors less likely to change their major before they graduate compared to freshmen business majors? 379 of the 673 freshmen psychology majors from a recent study changed their major before they graduated and 458 of the 725 freshmen business majors changed their major before they graduated. What can be concluded at the = 0.05 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer H₁: Select an answer Select an answer Select an answer b. The test statistic ? C = Select an answer (please enter a decimal) Select an answer (Please enter a decimal) (please show your answer to 3 decimal places.) c. The p-value = d. The p-value is ? Q e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) O The results are statistically insignificant at a = 0.05, so there is insufficient evidence to…
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A psychologist is investigating whether or not elderly people (age 60 to 70) have a different speaking speed in everyday conversation as compared to middle age people (age 20 to 40). The psychologist test 20-40 years old and 60-70 years old participants and determines speaking speed for each participant. Formulate in words the null and research hypotheses in the context of this study. The formulations should involve the dependent and independent variables used in the study. However, do not use the phrases “dependent variable” or “independent variable” as such. Do not use any mathematical symbols or expressions.
A researcher wants to know if people from different social classes (lower, working, middle, upper classes) vary in their support for same-sex marriage. The researcher measured the attitudes of people from different social classes toward same-sex marriage by asking if they think homosexuals should have right to marry (1=strongly disagree, 2=disagree, 3=agree, 4=strongly agree). The researcher hypothesized that social classes will vary significantly in their support for same-sex marriage. To test the hypothesis, the researcher conducted a one-way ANOVA and obtained the following results. ANOVA HOMOSEXUALS SHOULD HAVE RIGHT TO MARRY Sum of Squares df Mean Square F Sig. Between Groups 3.544 3 1.181 .496 .685 Within Groups 2202.349 924 2.383 Total 2205.892 927 Based on the results in the table above, can the researcher conclude that his hypothesis is supported and that there is a significant difference…
please help asap. data for the problem is provided in the picture as well.
If in general a reasearch question needs to be answered by using the null and alternative hypotheses correctly in words and statistical notations? How is it done?
29. The General Social Survey polled 1280 men and 1531 women to determine their level of education. The results are presented in the following table. Can you conclude that education level is independent of gender? Use ? = 0.01 level of significance. No High School Diploma High School Diploma Associate’s Degree Bachelor’s Degree Graduate Degree Men 178 608 96 248 150 Women 186 827 128 259 131 (a) State the hypotheses. (b) State the test statistic. (c) Calculate the P-value. (d) Make a decision. (e) State the conclusion addressing the original claim.
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10. In 1974, Loftus and Palmer conducted a classic s mated speed for the "smashed into" group? Use a college students watched a film of an automobile demonstrating how the language used to ask a ques- tion can influence eyewitness memory. In the study, accident and then were asked questions about what they saw. One group was asked, "About how fast were the cars going when they smashed into each other?" b. Compute the estimated value for Cohen's d to 81 92 study = 10 a = 85 = 160 = .01 group was asked the same question except Another the verb was changed to "hit" instead of "smashed into." The "smashed into" group reported signifi- cantly higher estimates of speed than the "hit" group. Suppose a researcher repeats this study with a sample of today's college students and obtains the following rence age di- etter results. to an Estimated Speed her e the = past For Smashed into Hit n = 15 n = 15 12. peri- М 3 40.8 М 3 34.0 SS = 510 SS = 414 S a. Do the results indicate a significantly…
П. STA requires each student to train a rat to perform specific behaviors. Student grades are determined by the rats' performance. Mr. Simmons is concerned that students who have prior experience with training rats or other animals may have an advantage. To test the hypothesis, she gave each student a survey at the start of the class. The survey asked students about their previous animal related experiences. At the course's conclusion, she compared the rats' learning for students with prior animal experience to students without. Do the data suggest a significant difference between the two groups of students? Rat scores for students with animal Rat scores for students with no experience experience n = 15 М-66 n = 10 M= 78 SS = 1420 SS = 2030 State the hypotheses, critical values with df and alpha = .05, calculate the test statistic and show all your work for each step of the calculations, answer the question stated above in bold-italics, AND state your conclusion using the 3-sentence…