determine the degrees of freedom if necessary English Air continually monitors the proportion of overweight items checked by passengers on its flights in order to evaluate the appropriateness of theirEnglish Air flights to North America contained 47 overweight items, and an independent,overweight fees. Recently, a random sample of 233 items checkedrandom sample of 264 items checked on English Air flights within Europe contained 30 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.(Choose one) ▼O=0OSOO20(c) Find the value of the test statistic. (Round to three or more decimal places.)O

Answered: Image /qna-images/answer/2c6e3674-1e39-4348-982a-5c96ba9eda27.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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English Air continually monitors the proportion of overweight items checked by passengers on its flights in order to evaluate the appropriateness of their overweight fees. Recently, a random sample of 231 items checked on English Air flights to North America contained 44 overweight items, and an independent, random sample of 248 items checked on English Air flights within Europe contained 29 overweight items. Based on these samples, can we conclude, at the 0.10 level of significance, that there is a difference between the proportion p1 of all items on English Air flights to North America that are overweight and the proportion p2 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 of formulas.)
In a random sample of males, it was found that 23 write with their left hands and 225 do not. In a random sample of females, it was found that 59 write with their left hands and 470 do not. Use a 0.05 significance level to test the claim that the rate of left-handedness among males is less than that among females.
In a random sample of males, it was found that 25 write with their left hands and 217 do not. In a random sample of females, it was found that 58 write with their left hands and 450 do not. Use a .05 significance level to test the claim that the rate of left-handedness among males is less than that among females. Identify the test statistic.z=?
A researcher was interested in comparing the resting pulse rates of people who exercise regularly and of those who do not exercise regularly. Independent simple random samples of 16 people who do not exercise regularly and 12 people who exerciseregularly were selected, and the resting pulse rates (in beats per minute) were recorded. The summary statistics are as follows. Use a 0.025 significance level to test the claim that the mean resting pulse rate of people who do not exercise regularly is larger than the mean resting pulse rate of people who exercise regularly. a)Identify the null hypothesis, alternative hypothesis. b)Find the test statistics c)Find the critical value d)Conclusion about the null hypothesis e)State the conclusion
in a random sample of males it was found that 20 write with their left hands and 224 do not. in a random sample of females , it was found that 63 write their left hands and 439 do not. use a 0.01 significance level to test the claim that the rate of left handedness among males is less than that among females.
In a random sample of males, it was found that 21 write with their left hands and 210 do not. In a random sample of females, it was found that 56 write with their left hands and 440 do not. Use a 0.05 significance level to test the claim that the rate of left-handedness among males is less than that among females. Identify the test statistic. and p value
A large firm employing tens of thousands of workers has been accused of discriminating against its female managers. The accusation is based on a random sample of 100 managers. The mean salary for 38 female managers is $76,189, while the mean annual salary of 62 male managers is $97,832. A two-sample t-test reveals that the difference between the male and female mean salaries is significant yielding a p-value less than 0.01, suggesting there is overwhelming evidence that the mean male salary is significantly higher than the mean female salary. The president of the company points out that the company has a strict policy of equal pay for equal work and that the difference in pay must be attributable to some other factors besides gender. To this point he provides the following multiple linear regression output where: Education is recorded as the number of years of education each manager had Experience is recorded as the number of years of experience Gender is recorded as 0 for…
Recently, after the legalization of marijuana, a simple random sample of 552 adult females showed that 129 of them used medicinal marijuana. It has been established that in 2000, 21.6% of adult females used medicinal marijuana. Use a 0.01 significance level to test the claim that the rate of medicinal marijuana use by adult females is now higher than in 2000. Use the critical value method.
A researach is conducted to observe whether there is significant difference between theproportions of black and white drivers stopped by the police. Simple random samplesof drivers are analyzed and the results indicate that24 black drivers out of 200 and 147white drivers out of 1400 are stopped by the police. Use a 5% significance level to testthe claim that the proportion of black direvers stopped by the police is greater than theproportion of white drivers who are stopped.
According to the American Diabetes Association,23.1% of Americans aged 60 years or older haddiabetes in 2007. A recent random sample of 200Americans aged 60 years or older showed that 52 ofthem have diabetes. Using a 5% significance level,perform a test of hypothesis to determine if thecurrent percentage of Americans aged 60 years orolder who have diabetes is higher than that in 2007.
An American medical team wishes to test whether passive smoking affects the chance of children contracting bronchitis. Historically, the disease has been known to occur at least once in 20% of children aged 12. The team analysed the results of a random sample of 250 12-year-old children who were passive smokers, and found that 30 of these had contracted bronchitis at least once in their lives. Use a 5% level of significance to test the claim that the proportion of children who are passive smokers is 20%. What is the null and alternate hypotheses What is the value of the test statistic from below z = 3.16 z = -3.16 z =3.89 z = -3.89 What is the p-value from below 0.0016 0.0008 0.0000 0.0001 Based on this evidence, what is the conclusion
A random sample of 10 secretaries was asked to type a certain memorandum using both computers and typewriters, and the time required to finish the task was recorded for each secretary. A test of hypothesis will be conducted to determine if there is enough evidence to conclude that the average time required to type a certain memorandum is faster if female secretaries are using computers rather than typewriters using a 5% level of significance. If the computed statistic is 1.5, what is the correct decision and appropriate conclusion at 5% level of significance. I need help in this question a)Reject Ho. There is sufficient evidence that the average time required to type a certain memorandum is faster if female secretaries are using computers rather than typewriters using a 5% level of significance. b)Do not reject Ho. There is no sufficient evidence that the average time required to type a certain memorandum is faster if female secretaries are using computers rather than…

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