QUESTION 12Suppose we are interested in whether travelers departing to Bali have spent researching potential health risks. Let the population proportion be denoted byp and assume we are interested in testing whether there is evidence that more than 40% of travelers have researched potential health risks.Which of the following represents the correct set of hypotheses for this 1-tailed test?O a. Ho: 0 = 0.4H: р <0.4ОБ. Но: р %3D 0.4H1: p < 0.4O c. Ho: P == 0.4H1: P> 0.4O d. Ho: p = 0.4H1: p> 0.4

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Answered: QUESTION 12 Suppose we are interested…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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QUESTION 18 Gueutal et al. (1995) tested the hypothesis that pregnancy would have an effect on performance appraisal ratings. The data below has been shortened and simplified, but the results are similar to the original study. We obtain a random sample of 7 female employees who are pregnant and 8 female emplayees who are not pregnant. Performance ratings were made on a scale from 1 (poor) to 7 (excellent). Pregnant Not pregnant IN Mean 15 SS 15 Variance 2.5 3 21 3 What is the weighted variance S 7 QUESTION 19 Gueutal et al. (1995) tested the hypothesis that pregnancy would have an effect on performance appraisal ratings The data below has been shortened and simplified, but the results are similar to the original study. We obtain a random sample of 7 female employees who are pregnant and 8 female employees who are not pregnant. Performance ratings were made on a scale from 1 (poor) to 7 (excellent). Pregnant Not pregnant 18 3 21 17 Mean IN 15 15 Variance 25 SS What is
please solve question 4.19 attached 4.11 for your reference
Question 36. We are interested in significant differences (level a = 0.05) between the expected values uị and u2 of two populations. Which of the following statements on statistical tests are correct? a) We will formulate the null hypothesis as 41 = 42. b) A t-test can always be applied in this situation. c) A p-value is the probability that the null hypothesis is correct, given the observed data. d) If we obtain a p-value of 0.04, we will reject (level a = 0.05) the null hypothesis.
E 6 of 30 Questions Completed 22 out of 30 Resources Submit All Press esc to exit full screen 1 Question Question 6 of 30 > For the past several years, 55% of students at a particular college who lived on campus one year chose to live on campus again 2 Question the next year. In light of rising tuition costs, the residential life administrators want to determine whether fewer students are planning to remain on campus for the next school year. They plan to conduct a one-sample z-test for a proportion, testing 3 Question Ho : p = 0.55 against Ha: p < 0.55, where p is the proportion of college students who plan to live on campus again during the next year. 4 Question The results of surveying a random sample of 452 students who currently on campus are as follows. 5 Question Sample size Sample count Sample proportion Standard error Statistic Probability value SE P-value 6 Question 452 237 52.4 0.023 -1.13 0.1292 7 Question 8 Question If the significance level for their test is 0.05, what…
Question 3 Y Only about 12% of all people can wiggle their ears. Is this percent lower for millionaires? Of the 369 millionaires surveyed, 33 could wiggle their ears. What can be concluded at the a = 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 answer ✓ H₁: ? Select an answer (please enter a decimal) (Please enter a decimal) c. The test statistic?v= d. The p-value = 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 ... (please show your answer to 3 decimal places.) (Please show your answer to 3 decimal places.) O The data suggest the population proportion is not significantly lower than 12% at a = 0.05, so there is statistically significant evidence to conclude that the population proportion of millionaires who can wiggle their ears is equal to 12%. The data suggest the population proportion is not significantly…
Answer question 7 and 8
QUESTION 6 At-test is used to test hypotheses for the population mean u. A random sample of 25 is selected for the analysis. How many degrees of freedom would be used for the test? QUESTION 7
Question 6.130 What is the p-value? Would you accept or reject the null at the 12% level?
40. We will take a random sample of 30 vehicles of a certain make and model and measure the fuel efficiency in miles per gallon (mpg) of each of them. We will conduct a hypothesis test at the 10% level of significance to determine whether there is evidence that the true mean fuel efficiency of all cars of this make and model differs from 32 mpg. What is the probability of failing to reject H, if the true mean is in fact 32 mpg? (A) 0.10 (B) 0.95 (C) 0.05 (D) 0.90 (E) 0.20

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