English Air continually monitors the proportion of overweight items checked by passengers on its flights in order to evaluate the appropriateness of theiroverweight fees. Recently, a random sample of 234 items checked on English Air flights to North America contained 38 overweight items, and an independent,random sample of 286 items checked on English Air flights within Europe contained 40 overweight items.Based on these samples, can we conclude, at the 0.05 level of significance, that there is a difference between the proportion p, of all items on English Air flightsto North America that are overweight and the proportion p, of all items on English Air flights within Europe that are overweight?Perform a two-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places and round your answers as specified in the parts below. (If necessary, consult a list offormulas.) (a) State the null hypothesis H and the alternative hypothesis H,.H, :0H :0(b) Determine the type of test statistic to use.Degrees of freedom:(c) Find the value of the test statistic. (Round to three or more decimal places.)(d) Find the two critical values at the 0.05 level of significance. (Round to three or more decimal places.)D and ](e) Can we conclude that the proportion of items that are overweight is different between the two typesof English Air flights?O Yes O No

Answered: Image /qna-images/answer/3cd1c850-3a43-47b4-9558-ebdbdfab84c2.jpg

Answered: English Air continually monitors the…

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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When is a researcher at risk of making a Type II error? a. whenever H1 is rejected b. whenever H0 fails to be rejected c. whenever H0 is rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.
When is a researcher at risk of making a Type II error? a. whenever H0 is rejected b. whenever H1 is rejected c. whenever H0 fails to be rejected d. The risk of a Type II error is independent of the decision from a hypothesis test.
Test the null hypothesis H0 : β1 = β2 against the alternative H1 : β1 < β2 at 1% significance level.
Which of the following is the value necessary for rejection (or nonacceptance) of the null hypothesis? 1. The critical value 2. The obtained value 3. Type I error 4. Type II error
A physician wants to test two blood glucose meters to see if there is any differences in measurements. To do this, he measures the glucose in blood samples taken from several randomly selected patients with both meters. Identify the null and alternative hypotheses for a hypothesis test, where each difference is calculated by subtracting the measurement on the second meter from the measurement on the first meter. A. H0:μd=0 Ha:μd>0 B. H0:μd=0 Ha:μd≠0 C. H0:μd=0 Ha:μd<0 D. H0:μd≠0 Ha:μd=0
1. In hypothesis testing, the value against which a test statistic is compared to determine whether or not the null hypothesis is rejected. 2. Calculate the general t statistic if estimate is equal to 3, hypothesized value is equal to 2.5 and the standard error is equal to 0.4. 3. Calculate the general t statistic if estimate is equal to 2.3, hypothesized value is equal to 2 and the standard error is equal to 0.2. 4. Calculate the general t statistic if estimate is equal to 2.1, hypothesized value is equal to 0.75 and the standard error is equal to 0.5. 5. Calculate the general t statistic if estimate is equal to 1.6, hypothesized value is equal to 0.35 and the standard error is equal to 0.8. 6. Calculate the general t statistic if estimate is equal to 1.75, hypothesized value is equal to 1 and the standard error is equal to 0.6. 7. Calculate the general t statistic if estimate is equal to 2.5, hypothesized value is equal to 2.1 and the standard error is equal to 0.2. 8.…
Match each of the hypothesis test conclusions below to the corresponding p-value. There is not enough evidence to reject the null hypothesis at any reasonable significance level. The evidence against the null and in favor of the alternative hypothesis is extremely strong. The evidence against the null hypothesis is statistically significant at the 10% level, but not at the 5% level. The result is statistically significant at the 5% level but not at the 1% level. I. p-value = .0003 II. p-value = .317 III. p-value = .089 IV. p-value = .039
The manufacturer of a new antidepressant claims that, among all people with depression who use the drug, the proportion p of people who find relief from depression is at least 65%. A random sample of 170 patients who use this new drug is selected, and 100 of them find relief from depression. Based on these data, can we reject the manufacturer's claim at the 0.1 level of significance? State the null hypothesis H0 and the alternative hypothesis H1 Find the z test value Find the p-value Can we reject the claim that the proportion of people who find relief from depression using the new antidepressant is at least 65%? Yes or No?
Determine which of the following statements are true about the critical region. The critical region is a term used when the null hypothesis is rejected. The critical region is comprised of extreme sample values that are very unlikely to be obtained if the alternative hypothesis is true. The critical regions is determined by the alpha level. The critical region is comprised of extreme samples values that are very unlikely to be obtained if the null hypothesis is true
3. A researcher is testing a two-tailed null hypothesis at the p < .01 level with df = 45. What critical value would she or he use? Justify your answer
Given that the P-value for the hypothesis test is 0.000 when rounded to three decimal places, what do you conclude? What do the results indicate about the rule that women and children should be the first to be saved?
A researcher wants to find the effect of a special diet on systolic blood pressure. A sample of 7 adults was selected to start them on this diet for 3 months. Based on this information, can it be stated that systolic blood pressure changes with the special diet? What type of hypothesis test will allow us to reach a conclusion in the situation posed above? A. Null B. Bilateral C. Unilateral right rejection zone D. Unilateral left rejection zone

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