At a neighboring university there is a website sponsored by the institution that matches people looking for roommates. According to university reports, the35% of students will find a partner the first time they use the website. A writer for the college newspaper tests this claim by choosing a random sample of 170 students who used the website to search for a roommate. Of the students surveyed,64they said they found a partner the first time they used the website. Complete the parts below to perform a hypothesis test to see if there is sufficient evidence, at the significance level of0.05, to reject the claim that the proportion,p, of all students who are going to find a partner the first time they use the website is35%. (to) Formulate the null hypothesish and the alternative hypothesish that you will use in your test. 믐 0<0 OSO O>0 20 X 0=0 tools help (b) In this hypothesis test, you will use a testZ. Find the values of pandn61-p)to confirm that a Z test can be used. (A standard is that p≥10and n61-p)>10under the assumption that the pull hypothesis is true). In this case the sample size and is the proportion of the population that you

At a neighboring university there is a website sponsored by the institution that matches people looking for roommates. According to university reports, the35% of students will find a partner the first time they use the website. A writer for the college newspaper tests this claim by choosing a random sample of 170 students who used the website to search for a roommate. Of the students surveyed,64they said they found a partner the first time they used the website. Complete the parts below to perform a hypothesis test to see if there is sufficient evidence, at the significance level of0.05, to reject the claim that the proportion,p, of all students who are going to find a partner the first time they use the website is35%. (to) Formulate the null hypothesish and the alternative hypothesish that you will use in your test. 믐 0<0 OSO O>0 20 X 0=0 tools help (b) In this hypothesis test, you will use a testZ. Find the values of pandn61-p)to confirm that a Z test can be used. (A standard is that p≥10and n61-p)>10under the assumption that the pull hypothesis is true). In this case the sample size and is the proportion of the population that you

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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Name: ID: A 8. An experiment is conducted to sce if learning while using an online website is as effective as leaming from a teacher who is lecturing. Fifty college students volunteer and will be randomly placed into two groups. One group of voluntcers will be given a lesson online and the qther group will have a teacher explain the lesson. After the lcsson, a test will be given to sec which group, on average, scores higher. What is the purpose of random assignment in the context of this experiment? So that both groups will have exactly twenty-five voluntcers. b. a. So that both groups of voluntcers are roughly cquivalcnt at the beginning of the experiment. So that if there are many voluntcers that prefer leaming online, thcy will be all be placed into the same group. d So that if two of the voluntcers know each other, they will be split into different c. groups. ffect the choire of snack a person cats. Twenty
Is the average time to complete an obstacle course different when a patch is placed over the right eye than when a patch is placed over the left eye? Thirteen randomly selected volunteers first completed an obstacle course with a patch over one eye and then completed an equally difficult obstacle course with a patch over the other eye. The completion times are shown below. "Left" means the patch was placed over the left eye and "Right" means the patch was placed over the right eye. Time to Complete the Course Right 48 44 47 40 46 41 46 48 Left 45 42 45 36 45 35 44 45 Assume a Normal distribution. What can be concluded at the the αα = 0.10 level of significance level of significance? For this study, we should use The null and alternative hypotheses would be: `0:` `a:` 2. The test statistic = (please show your answer to 4 decimal places.) 3. The p-value = (Please show your answer to 4 decimal places.)
A Driver keeps goes through 3 intersections. The probabibilty of hitting a red light at each are 0.2, 0.4, and 0.4 respectively. What is the probabibility of hitting at least two red lights?
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In fall 2014, 36% of applicants with a Math SAT of 700 or more were admitted by a certain university, while 14% with a Math SAT of less than 700 were admitted. Further, 34% of all applicants had a Math SAT score of 700 or more. What percentage of admitted applicants had a Math SAT of 700 or more? (Round your answer to the nearest percentage point.) %
A consumer agency wants to determine which of two laundry detergents, A or B, cleans clothes better. Fifty pieces of fabric are subjected to the same kinds of stains (grass, mud, coffee). Then 25 pieces are randomly assigned to be cleaned with detergent A and the remaining 25 pieces are cleaned with detergent B. After being laundered, the pieces of fabric are rated on a scale from 1–10, with 1 being the least clean to 10 being the most clean. The difference in mean ratings (A – B) was determined to be 1.5. Assuming there is no difference in the two detergents, 200 simulated differences in sample mean ratings are displayed in the dotplot. Using the dotplot and the difference in mean ratings from the samples, is there convincing evidence that the one detergent is better than the other? Yes, because a difference in mean rating of 1.5 or more occurred only 23 out of 200 times, meaning the difference is statistically significant and there is convincing evidence that A is more effective…
A survey was conducted at UP Manila where 80 students were randomly asked whether they liked hamburgers or spaghetti for their snacks. 52 of the students say they like hamburgers, 40 like spaghetti and 10 do not like either of the hamburger or spaghetti. How many students like only hamburger or only spaghetti? Answer is
Please solve this question below. Thank you! 9. Challenge A bag contains 200 red and blue marbles. Three people each took samples of 25 marbles and noted the number of red marbles. Person A 17 red marbles out of 25 marbles Person B 12 red marbles out of 25 marbles Person C 20 red marbles out of 25 marbles a. Combine the samples to make one large sample. Use that sample to predict the number of red marbles in a similar bag that contains 300 marbles. b. Explain how having a fourth sample would make the estimate better.
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A recent poll of 1500 new home buyers found that 60% hired a moving company to help them move to their new home. Find the margin of error for this poll if we want 95% confidence in our estimate of the percent of new home buyers who hired movers.Group of answer choices5%2.48%4.96%2.08%2.5%
The following data give the measurements of the axles of bicycle wheels. 12 samples vere taken so thát each sample contains the measurements of 4 axles. The measurement which were more than 5 inches are given here. Obtain trial control limits forx and R charts and comment whether the process is under control or not. 139 140 142 136 145 146 148 145 140 140 141 138 140 142 136 137 146 148 145 146 139 140 137 140 145 142 143 142 146 149 146 147 144 139 141 141 139 142 144 142 146 144 146 144 [For n = 4, A, = 0.73, 138 139 139 138 D3 = 0, D4= 2.28]
In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain university, while 14% with a Math SAT of less than 700 were admitted. Further, 38% of all applicants had a Math SAT score of 700 or more. What percentage of admitted applicants had a Math SAT of 700 or more? (Round your answer to the nearest percentage point.) %