A flight attendant selects a random sample of 201 travelers. For each, he records the class in which the persontravels and whether they have carry-on luggage. He would like to know if there is convincing evidence that the classin which a person travels is associated with having carry-on luggage. Let a = 0.05.What are the hypotheses for this test?O Ho: Class is not independent of carry-on luggage.Hg: Class is independent of carry-on luggage.O Họ: Class is independent of carry-on luggage.Hg: Class is not independent of carry-on luggage.O Họ: There is an association between class and carry-on luggage.Hạ: There is no association between class and carry-on luggage.O Ho: The proportion of travelers who have carry-on luggage is not the same in the types of class.Hg: The proportion of travelers who have carry-on luggage is the same in the types of class.

In order to determine whether the class in which person travels is independent of whether they have…

Answered: A flight attendant selects a random…

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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A baseball team claims that the mean length of its games is 1.6 hours. State H0 and Ha in words and in symbols. Then determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. Explain your reasoning. State the null hypothesis in words and in symbols. Choose the correct answer below. A. The null hypothesis expressed in words is, "the mean length of a baseball team's games is 1.6 hours." The null hypothesis is expressed symbolically as, "H0: μ=1.6." B. The null hypothesis expressed in words is, "the mean length of a baseball team's games is more than 1.6 hours." The null hypothesis is expressed symbolically as, "H0: μ≠1.6." C. The null hypothesis expressed in words is, "the mean length of a baseball team's games is at most 1.6 hours." The null hypothesis is expressed symbolically as, "H0: μ≤1.6." D. The null hypothesis expressed in words is, "the mean length of a baseball team's games is…
Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of the quality of the restroom facilities, The following tables show the responses from a sample of 100 persons. Gender of Respondent Total Male Female Quality of Facilities Above average 8 7 15 Average 26 24 50 Below 7 28 35 Total 41 59 100 A ?2 test is carried out to determine whether there is an association between the gender of persons and their opinion.i) State appropriate null and alternative hypotheses ii) Determine the critical region of the test at the 1% level of significance iii) Calculate the expected value for Male and below average iv) For a test statistic of 9.825, explain with reason, the conclusion of your test.
K In a July 2017 report, a research firm stated that 39% of people from a certain region reported being harassed while online. An AP Statistics student decided to conduct her own survey at her high school of 3,260 students. She randomly selected 239 students to be surveyed and 99 of them stated that they had been harassed online. Does her survey suggest that the problem is worse at her school than it is for a typical person in the region? Determine the appropriate hypotheses. Ho P HA P (Type integers or decimals.) The test statistic is z = (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State your conclusion. Use a = 0.05. the null hypothesis. There sufficient evidence to conclude that the proportion of students in the high school who were harassed while online is the proportion of people from the region being harassed while online.
In 1948, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 429 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 363 indicated that they were total abstainers. Determine the P-value for this hypothesis test.
A publisher reports that 67% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 250 found that 62% of the readers owned a particular make of car. State the null and alternative hypotheses. what is HO and HA ?
In baseball, League A allows a designated hitter (DH) to bat for the pitcher, who is typically a weak hitter. In League B, the pitcher must bat. The common belief is that this results in League A teams scoring more runs. In interleague play, when League A teams visit League B teams, the League A pitcher must bat. So, if the DH does result in more runs, it would be expected that league A teams will score more runs in League A park than when visiting League B parks. To test this claim, a random sample of runs scored by league A teams with and without their DH is given in the accompanying table. Complete parts a) through d) below. X Sample of Runs a) Draw side-by-side boxplots of the number of runs scored by League A teams with and without their DH. Choose the correct graph below. OA. B. O C. B A B A 0 5 5 10 10 15 XXX 15 Does there appear to be a difference in the number of runs between these situations? O D. 0 B A B A 5 10 10 OA. No because the number of runs scored in a League A park…
In 2011, a U.S. Census report determined that 52% of college students are working students. A researcher thinks this percentage has changed and surveys 182 college students. The researcher reports that 106 of the 182 are working students. Is there evidence to support the researcher's claim at the 1% significance level? a. Determine the null and alternative hypotheses. Ho:p = H1: p ?V (Select the correct symbol and enter the value.) b. Determine the test statistic. Round to two decimal places. c. Find the p - value. Round to four decimal places. p- value = d. Are the results statistically significant? O Fail to reject the null hypothesis. O Reject the null hypothesis. e. Write the conclusion. O There is not sufficient evidence to support the claim that the percentage of working college students has changed. O There is sufficient evidence to support the claim that the percentage of working college students has changed.
Some people claim that they can tell the difference between a diet soda and a regular soda in the first sip. A researcher wanting to test this claim randomly sampled 84 such people. She filled 84 plain white cups with soda, half diet and half regular through random assignment, and asked each person to take one sip from their cup and identify the soda as diet or regular. 51 participants correctly identified the soda. Conduct and interpret a hypothesis test for the following question: are these people any better or worse at telling the difference between diet and regular soda than random guessing (correctly identify soda half of the time)? HINT: what is your hypothesized proportion if you want to test if these participants are right or not half of the time? Use a = .01 significance level. Solve Critical value:
Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of the quality of the restroom facilities, The following tables show the responses from a sample of 100 persons. Quality of Facilities Gender of Respondent Male Female Totals Above Average 8 7 15 Average 26 24 50 Below Average 7 28 35 Totals 41 59 100 A ?2 test is carried out to determine whether there is an association between the gender of persons and their opinion. State appropriate null and alternative hypotheses Determine the critical region of the test at the 1% level of…
A store owner wanted to determine if more than 5% of customers made a purchase after he sent out a text. He sent out 300 texts to 300 randomly selected customers. Out of those 300, 17 made purchases. Is this evidence that if he sent out texts to all of his customers more than 5% would make purchases? What is the appropriate null and alternative hypothesis? Ho: p= 0.05 Ha: p> 0.05 O Ho: phat = 0.05 Ha: phat > 0.05 O Ho: p= 0.056 Ha: p > 0.056 O Ho: mu = 0.05 Hla: mu > 0.05
Suppose that in a random selection of 100 colored candies, 23% of them are blue. The candy company claims that the percentage of blue candies is equal to 28%. Use a 0.10 significance level to test that claim. Identify the null and alternative hypotheses for this test. Choose the correct answer below. A.H0:p=0.28 H1:p>0.28 B. H0:p≠0.28H1:p=0.28 C. H0:p=0.28H1:p<0.28 D.H0:p=0.28H1:p≠0.28 -Identify the test statistic for this hypothesis test. -Identify the P-value for this hypothesis test. -Identify the conclusion for this hypothesis test. A. Fail to reject H0. There is sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 28% B. Reject H0. There is not sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 28% C. Fail to reject H0. There is not sufficient evidence to warrant rejection of the claim that the percentage of blue…

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