A university offers a certain course that students can take in-person or in an online setting.Teachers of the course were curious if there was a difference in the passing rate between twosettings. The teachers selected random samples of 200 students who take the course in-personand 300 students who take the course online for the hypothesis testing. From these twoindependent samples, 80% of the students passed the in-person setting and 75% of studentspassed the online setting. They were willing to treat these as representative samples ofall studentswho may take each setting of the course.(a) Test whether there is a difference in the passing rate between two course settings at 4%significant level.(b) Find the p-value of the test and does it lead to the same conclusion in (a)?(c) Find the 96% confidence interval to estimate the difference between the proportion of studentswhopassin each setting of the course (Pin-p'in-person – Ponline).

Given that, a university offers a certain course that students can take in-person or in an online…

Answered: A university offers a certain course…

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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The Best Pet Food company has a business objective of expanding its product line beyond its current Beef and Salmon cat food. The company developed two new products, one based on Chicken Liver and the other based on Shrimp. The company conducted an experiment to compare the two new products with its two existing ones, as well as a generic Kidney-based product sold in a supermarket chain. For the experiment, a sample of 40 cats was selected at the Toronto Cat Rescue Volunteer Centre. A random selection of eight cats were assigned to each of the five products being tested. Each of the cats was then presented with 5 ounces of the selected food in a dish at feeding time. The researchers defined the variable to be measured as the number of ounces of food that the cat consumed within a 10-minute interval that began when the filled dish was presented. The results of this experiment are given below. Beef 4.79 4.10 4.98 4.18 4.32 Salmon 4.86 4.90 4.76 4.86 4.86 4.69 4.46 4.88 SUMMARY Groups…
As winter is here and I love planting my winter garden. I have planted my winter vegetables ( Broccoli, Artichoke, Cauliflower, ect.), on average 10 neighbors plant a garden during winter. I asked 20 neighbors of they were going to plant their winter gardens and 12 of them said yes. Test this hypothesis at .05 significance level. Assume a random sample.
Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation. State the Null and Alternative Hypotheses.
How many subjects in the "patch only" group would you expect not to quit
2. Several years ago, a census of all students enrolled at a large undergraduate university revealed that 19% of the students were seniors, 23% were juniors, 27% were sophomores, and 31% were freshmen. This year, the student senate did a survey to see whether these percentages have remained the same. A random sample of 200 students included 50 senior, 46 juniors, 55 sophomores, and 49 freshmen. Using a 2.5% significance level, test the null hypothesis that the percentages are still 19% seniors, 23% juniors, 27% sophomores, and 31% freshmen. Use the Critical Value Approach.
Christine, a researcher in psychology and biobehavioral health, believes that city residents and residents of rural areas differ in how appealing they find owning a cat. A random sample of 109 people who live in San Antonio were surveyed and 59 identified themselves as a "cat person." A random sample of 108 people who live in the surrounding rural area were selected and 72 identified themselves as a "cat person." Conduct an appropriate hypothesis test at the a = 0.1 significance level to test Christine's claim. Round answers to 4 decimal places where appropriate. a. State the null and alternative hypotheses. Ho: p. H₁: p. b. What is the appropriate distribution to use for the hypothesis test? Z (Normal) c. Find the test statistic. Test Statistic: -1.9593 X d. Determine the P-value: op. P-value: 0.0501 X O p.
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Do the needs of patients in the emergency room differ for those who come by car vs. those by ambulance? Of the randomly selected emergency room patients who came by car 51 had an injury, 40 were sick, 31 had heart problems and 61 had other needs. Of the randomly selected emergency room patients who came by ambulance 45 had an injury, 30 were sick, 55 had heart problems and 38 had other needs. Conduct the appropriate hypothesis test using an a = 0.10 level of significance. a. What is the correct statistical test to use? O Paired t-test O Homogeneity Goodness-of-Fit O Independence b. What are the null and alternative hypotheses? Ho: O Means of transportation to the emergency room and emergency room needs are independent. Means of transportation to the emergency room and emergency room needs are dependent. The distribution of emergency room needs for patients who come by car is the same as it is for patients who come by ambulance. The distribution of emergency room needs for patients who…
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Two different simple random samples are drawn from two different populations. The first sample consists of 40 people with 20 having a common attribute. The second sample consists of 1800 people with 1291 of them having the same attribute. Compare the results from a hypothesis test p1=p2 (with a 0.05 significance level) and a 95% confidence interval estimate of p1-p2. What are the null and alternative hypotheses for the hypothesis test?

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