Answer the following True or False: If a researcher wants to test the claim that more than 25% of all students purchased their textbook online, then the null and alternative hypotheses are Ho: u = 0.25 and Ha: H > 0.25. O true O false
Q: I’m testing the claim that a population exceeds .62, the null hypothesis is H0, what is it?
A: H0 = Null Hypothesis H1 = Alternative Hypothesis
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A: HypothesisNull Hypothesis (H0) = The data follows the phenotypic ratio (i.e. 9:3:3:1)Alternative…
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A: Given sample size and sample proportion we use one same z proportion .
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Q: According to the Centers of Disease Control, about 22% of American young people between the ages of…
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Q: Which of the following are the appropriate hypotheses to be tested? Ho=0.69 Ha> 0.69 0 Ho: p = 0.69…
A: Given that Sample size (n)=325 found that 234 had pet Population proportion (p)=0.69 We have to…
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Q: According to the Centers of Disease Control, about 9% of Americans between the ages of 12 and 19…
A: p = 9% = 0.09 According to the Centers of Disease Control, about 9% of American young people between…
Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…
A: Given that : n=240 x=19 (Left handed) x=221 (Right handed) By using one sample…
Q: What is the interpretation of a Pearson's r correlation coefficient of 0.8 in hypothesis testing?
A: Understanding Pearson's r Correlation Coefficient Pearson's r correlation coefficient measures the…
Q: According to the Centers of Disease Control, about 22% of American young people between the ages of…
A: (a) Denote p as the true proportion of obese students between 12 and 19 years of age, in the local…
Q: Which of the two hypotheses is the researcher always testing to reject or not?
A: The hypotheses are null and alternative hypothesis.
Q: According to a University Center for Logistics Management, 4% of all merchandise sold in the United…
A: The provided information are:
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A: Observational study: In observational study, the individuals of the study are observed by the…
Q: tate the null and research hypotheses: H0: H1: 2. What is the value of the F statistic for…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: 10% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…
Q: According to a University Center for Logistics Management, 10% of all merchandise sold in the United…
A: Given the hypothesis,H0:p=0.01Ha:p>0.01A Seattle department store sampled 90 items sold in…
Q: According to a University Center for Logistics Management, 11% of all merchandise sold in the United…
A:
Q: We are interested in comparing the proportions of men and women who say earning a large salary is…
A: Given the data of men and women who say earning a large salary is very important to them as Yes…
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Q: The mean age of a bus driver in Chicago is 47.4 years. If a hypothesis test is performed to test the…
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Q: Suppose that you did a Right-Tailed Test and that you Rejected the Null Hypothesis. Which is bigger,…
A: Decision Rule: For right tailed test, If the test statistic is greater than the critical value, then…
Q: Which of following is not true about the null hypothesis? Suggesting that there is an absence of…
A: a) It is true that null hypothesis suggest that there is an absence of effect.
Q: According to a University Center for Logistics Management, 13% of all merchandise sold in the United…
A: n = 90 x = 10 p = 13% = 0.13 If you have the following null and alternative hypotheses for a test…
Q: An article reports that blue eyed people earn less than brown eyed people, with these numbers:…
A: P-value is much greater than 0.05 level of significance.
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A: It is given that the claim is that the mean weight of the cereal in its packets is not 12 oz.
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A: Given data, p=68%=0.68 α=0.02
Q: You are conducting a study to see if the accuracy rate for fingerprint identification is…
A: According to the given information, we have H0: p≥0.69Ha: p<0.69
Q: According to a Pew Research Center study, in May 2011, 33% of all American adults had a smart phone…
A: In a research study, 33% of American adults had a smartphone. The number of community college…
Q: 16% of all college students volunteer their time. Is the percentage of college students who are…
A: We have given that p = 0.16n = 398x = 56p̂ = x/n = 56/398 = 0.1407α = 0.01
Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…
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Q: According to a Pew Research Center study, in May 2011, 33% of all American ac smart phone (one which…
A: Sample size n=359Favorable cases x=152NOTE: according to bartleby guidelines expert can solve…
Q: In general, if sample data are such that the null hypothesis is rejected at the ? = 1% level of…
A: The sample data has rejected the null hypothesis at α=0.01 level of significance for both one tailed…
Q: 14% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those…
A: Here is given that, population proportion is 0.14 And sample number is 341 and 34 selected from 341.…
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A: you conducted a case-control study to assess whether a positive association exists between syphilis…
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- Before the semester began, Professor Keithley predicted that 15% of hisphilosophy students would receive an A, 30% a B, 40% a C, 10% a D, and 5%an F. At the end of the semester, 14 of Professor Keithley’s philosophy studentsearned an A, 19 a B, 12 a C, 5 a D, and 2 an F.Use the Chi-Square test and a 0.05 level of significance to determine if ProfessorKeithley’s predicted percentages were accurate. (State your null and alternativehypothesis, find the critical values and test statistics, make a decision, and writea conclusion based on your results).Need help please!Are freshmen psychology majors more likely to change their major before they graduate compared to freshmen business majors? 428 of the 639 freshmen psychology majors from a recent study changed their major before they graduated and 502 of the 783 freshmen business majors changed their major before they graduated. What can be concluded at the a = 0.10 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v| Select an answer v H: Select an answer v Select an answer v| Select an answer v AW b. The test statistic ? v = (please show your answer to 2 decimal places.) es c. The p-value = (Please show your answer to 4 decimal places.) d. The p-value is ? a e. Based on this, we should Select an answer f. Thus, the final conclusion is that ... the null hypothesis. O The results are statistically significant at a = 0.10, so there is sufficient evidence to conclude that the population…
- 11% of all Americans suffer from sleep apnea. A researcher suspects that a higher percentage of those who live in the inner city have sleep apnea. Of the 340 people from the inner city surveyed, 51 of them suffered from sleep apnea. What can be concluded at the level of significance of a = 0.01? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v Select an answer (please enter a decimal) H1: ? v Select an answer (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 ? a f. Based on this, we should Select an answer | the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population proportion is not significantly larger than 11% at a = 0.01, so there is not sufficient evidence to conclude that the population proportion of inner city residents who have sleep apnea is larger than…Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null hypothesis is actually true, then there is a 5% chance that the researcher will end up rejecting the null hypothesis in error. True FalseAre freshmen psychology majors more likely to change their major before they graduate compared to freshmen business majors? 432 of the 627 freshmen psychology majors from a recent study changed their major before they graduated and 459 of the 726 freshmen business majors changed their major before they graduated. What can be concluded at the X = 0.01 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. The p-value = d. The p-value is ? ✔ α e. Based on this, we should f. Thus, the final conclusion is that ... Select an answer Select an answer (please enter a decimal) (Please enter a decimal) (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) Select an answer the null hypothesis. O The results are statistically significant at a = 0.01, so there is sufficient evidence to…
- Which of these is a manifestation of null hypothesis? a. As temperature increases so too will the level of aggression b. Older adults will have worse memories than younger adults c. There will be no relationship between caffeine consumption and performance d. There will be a significant difference between group 1 and group 2A recent study of 1000 high school juniors and seniors asked whether or not they felt smartphones are a valuable learning tool. Additional data were gathered on their smartphone plan (unlimited data, additional texting, or standard voice plan) and which class they were in (junior vs. senior). Which of the following is a correct pair of hypotheses the researchers could test? (A) Ho: The proportion of juniors and seniors who feel smartphones are a valuable learning tool is the same for students that have each type of plan. Ha: The proportion of juniors and seniors who feel smartphones are a valuable learning tool is not the same for students that have each type of plan (B) Ho: The proportion of students who feel smartphones are a valuable learning tool is the same for students that have each type of plan. Ha: The proportion of students who feel smartphones are a valuable learning tool is not the same for students that have each type of plan. (C) Ho: There is an association between class…Suppose we have a case-control study that completes and yields a study OR = 4.5. If we were told the true OR in the population was actually 2.25 (we normally wouldn’t know this, but suppose hypothetically someone was able to know this and told us), this again means our study OR is biased. Is our study OR biased towards or away from the null? A)Away from the null. B)Towards the null.
- A newsletter publisher believes that 29% of their readers own a laptop. Is there sufficient evidence at the 0.05 level to refute the publisher's claim? State the null and alternative hypothesis for the above scenarioAccording to the Centers of Disease Control, about 22% of American young people between the ages of 12 and 19 are obese.A student claims that the students in his local schools are in better shape than the national average, so their proportion of obese students is less than 22%. Which are the appropriate null and alternative hypotheses for this study? H0: p = 22%, HA: p < 22% H0: p ≠ 0, HA: p = 0 H0: p = 22%, HA: p > 22% H0: p = 22%, HA: p ≠ 22% Suppose that the result is to Fail to reject H0.Which is the proper conclusion? There is sufficient evidence to support the claim that the students at his local schools have a smaller proportion of obese students. There is not enough information to answer this question. There is not sufficient evidence to support the claim that the students at his local schools have a smaller proportion of obese students.12% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of those who live in the inner city have sleep apnea. Of the 372 people from the inner city surveyed, 30 of them suffered from sleep apnea. What can be concluded at the level of significance of a = 0.10? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v Select an answer v (please enter a decimal) H1: ? v Select an answer v (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 ? v a f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population proportion is not significantly different from 12% at a = 0.10, so there is sufficient evidence to conclude that the population proportion of inner city residents who have sleep apnea is…
