In a two-tailed test, with α=0.01 , and N is 41. b) Is the tobt of +4.0 of significant?
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In a two-tailed test, with α=0.01 , and N is 41.
b) Is the tobt of +4.0 of significant?
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- A1) - Calculate the mean speed [in mph] of 4 cars travelling at 46 mph and 4 cars travelling at 63 mph. A2) Calculate the root mean square speed [in mph] of 6 cars travelling at 43 mph and 7 cars travelling at 56 mph. Sidenote: for a1 I tried submitting the answer as 54.5 and it was wrong for a2 I tried submitting the answer as 50.42 and it was incorrectConsider a test of Ho: = 75 performed with the computer. The software reports a two-tailed p-value of 0.1032. Make the appropriate conclusion for each of the following situations. a. Ha: 75, z = 1.63, a = 0.08 d. H: #75, z = -1.63, α = 0.01 a. Choose the correct answer below. O There is sufficient evidence to reject Ho- O There is insufficient evidence to reject Ho- b. Choose the correct answer below. O There is insufficient evidence to reject Ho- There is sufficient evidence to reject Ho c. Choose the correct answer below. O There is sufficient evidence to reject Ho- There is insufficient evidence to reject Ho- d. Choose the correct answer below. O There is sufficient evidence to reject Ho- O There is insufficient evidence to reject Hofor one week) and S hypertensive controls (received placebo for one week) were involved, chosen from Al-Hussein Teaching Hospital in 2010. The results below were revealed: Statistics Mean SBP 150 S.D Cases Controls |142 12 9 Find out whether the (drug used has a significant effect on the blood pressure level.
- For any population, a z-score of -2.00 is a more extreme score than a z-score of +1.00. TRUE OR FALSEWhich APA sentence below is formatted correctly with no mistakes? t(.8128) = 7.0, p = α, tobt = 4.25 t(10), tcrit > 5.3, p < α t(30) = 2.56, p < .01, d = 1.23 t(25) 3.54 = p < .01, d > 0.84The average amount of time it takes for couples to further communicate with each other after their first date has ended is 2.35 days. Is this average different for blind dates? A researcher interviewed 70 couples who had recently been on blind dates and found that they averaged 2.5 days to communicate with each other after the date was over. Their standard devlation was 0.655 days. What can be concluded at the the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answerv H: ?vSelect an answerv 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 answerv the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest that the population mean is not significantly different from 2.35 at a = 0.10, so there is statistically…
- Does training in stress reduction make a difference for student success? 15 students received training (M1= 88, SS1= 400) and 15 students did not (M2= 82, SS2= 440). Test using α = .05 What type of error could you be making?Suppose a random sample of n=60 college students were surveyed and r=11 of them said that blue is their favorite color. Use a=0.05. What is the value of the sample test statistic? Find the p value. 80% of all supermarketsprices end in the digit 9 or 5. Suppose a random sample of 116 items in a suoermarket find that 87 have prices that end in 9 or 5. Use a=0.05. What is the value of the sample test statistic? Find the p value.The test statistic for testing HO: mu = 100 against Ha: mu != 100 wast 3.3, with p-value of 0.001. Which of these is the correct conclusion? Since the p-value is very small, we conclud that mu != 100 Since the p-vaue is very smal, we are unable to conlude that mu != 100 Since the p-value is very small, we must conclude the mu = 100 In order to interpret the results, we must first know the sample size. Since the p-value is very small, we are unable to conclude that mu = 100.
- A humane society claims that less than 62% of households in a certain country own a pet. In a random sample of 500 households in that country, 290 say they own a pet. At a = 0.05, is there enough evidence to support the society's claim? Complete parts (a) through (c) below. (a) Identify the claim and state Ho and H Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. Less than % of households in the country own a pet. O B. % of households in the country own a pet. O C. The percentage households in the country that own a pet is not %. O D. More than % of households in the country own a pet. Let p be the population proportion of successes, where a success is a household in the country that owns a pet. State Ho and H.. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) CO A. Hnipz O B. Hnip= OC.…When using a Chi-square test, the expected frequency, E, has to be at least 5. State two possible approaches that can be implemented when the expected frequency, E, is less than 5.A researcher developing scanners to search for hidden weapons at airports has concluded that a new scanner is significantly better than the current scanner. He made his decision based on a test using a = 0.05. Would he have made the same decision at a = 0.20? How about α = 0.01? Explain. Select the statement relating decision making to values of a. O A. His decision would have been the same for a = 0.01 but may have been different for a = 0.20. O B. His decision would have been the same for α = 0.20 but may have been different for α = 0.01. O C. His decision may have been different for both α = 0.01 and α = 0.20. O D. His decision would have been the same for both α = 0.01 and α=0.20.