Answer the given word problem by performing the test of hypothesis using t-test with two unequal sample means and standard deviations.A teacher wishes to find out if the proposed method of teaching Statisticis more effective than the existing. Two groups of approximately equalintelligence were randomly selected. From one group, the teacher selected 10students for the proposed method of teaching. From the second group, theteacher selected another 9 students for existing method. After 2 months ofteaching, same 30 item test was administered to the two groups. Below are thesummary of the values used.MethodProposedExistingN 10N2 = 9X = 24.27X = 21.07S = 4.98S2 5.21

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Answered: Answer the given word problem by…

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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Let's suppose you draw random samples of same size from same population and compute 95% confidence intervals for population mean and consider the statement: each sample produces the same confidence interval for mean. Determine whether above statement is true or false and give the reason: a. Tr True. Different random samples may produce different observations and then different sample means, resulting in different confidence intervals. b. Tr False. Different random samples may produce different observations and then different sample means, resulting in different confidence intervals. c. False. Different random samples may produce different observations and different sample means, resulting in the same confidence intervals. d. Fa True. Different random samples will produce the same observation and then same sample mean, resulting in the same confidence intervals. Fa
Choose a type of confidence interval: one proportion z, two proportion z, one sample t, two sample t, or paired t. Can someone create one or a few original practice problems that could be solved using that test and show the full solution? If you can be thorough in your explanation it would be great. I need some new ones to work on and compare my work to the answers. Thanks
A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 5% margin of error at a 95% confidence level, what size of sample is needed? Be sure to round accordingly.The candidate would need to survey people in the community in order to be within a 5% margin of error at a 95% confidence level.
Do wearable devices that monitor diet and physical activity help people lose weight? Researchers had 237 subjects, already involved in a program of diet and exercise, use wearable technology for 24 months. They measured their weight (in kilograms) before using the technology and 24 months after using the technology. (a) Explain why the proper procedure to compare the mean weight before using the wearable technology and 24 months after using the wearable technology is a matched pairs t test. Choose the correct explanation. A person's weight before and after wearing the device would not be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after…
3
A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 6% margin of error at a 95% confidence level, what size of sample is needed? Be sure to round accordingly. The candidate would need to survey people in the community in order to be within a 6% margin of error at a 95% confidence level.
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A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 3% margin of error at a 95% confidence level, what size of sample is needed? Be sure to round accordingly. The candidate would need to survey people in the community in order to be within a 3% margin of error at a 95% confidence level.
Give hypothesis, rejection region and test statistic and conclusion please.
A political scientist claims that the president’s approval rating in Ogun State is lower than the president’s approval rating in Bayelsa State. To prove his point, he conducted surveys in the two states. Of the 874 individuals polled in Ogun state, 350 favored the president, and of the 1024 individuals polled in Bayelsa state, 438 favored the president. Test the political scientists claim at the 5% level of significance. The p-value of the test is
For this week's Discussion post, choose a one or two sample Hypothesis test related to COVID. For example, a test that all adults above the age of 30 will get Covid. How will you set up the hypothesis test to disprove/ do not reject the Hypothesis you made. What will be the sample size, data, how will you conduct the test, please provide all your references how you obtained the data? Also, answer what is the difference between the 'null hypothesis' and the 'alternate hypothesis'? What are some tips for knowing 'how' to set up the two hypothesis? Is the 'claim' always the alternate hypothesis? When do we use a z-value rejection region when testing a claim about a population mean? When do we use a t-value?
A big household appliances manufacturer would like to conduct a survey to find the proportion p of consumers who bought the brand-new novel household appliance satisfied with their purchase. How large a sample n should they take to estimate p with 2% margin of error and 90% confidence level? Because of the unprecedented novelty of the appliance no previous research can be of help here so that one has to use the conservative approach.

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