A study was conducted to investigate how effective a new diet was at lowering cholesterol. The subjects’ cholesterol levels were measured the day before the dieting period began and eight weeks later. The measurements are given in the table below. Subjects were randomly selected to be part of the experiment.| Subject | A | B | C | D | E | F | G | H | I ||---------|----|----|----|----|----|----|----|----|----|| Before | 209| 210| 205| 198| 216| 217| 238| 240| 222|| After | 199| 207| 189| 209| 217| 202| 211| 223| 201|1. We wish to conduct the hypothesis test to determine if there is evidence of a decrease in cholesterol levels from the before to after measurements. A. What are the hypotheses for this test? B. Regardless of whether you believe the conditions are met or not, conduct the hypothesis test. What do the results tell us?

Followings are the explanation of the question Use the excel and find the Mean and Standard…

Answered: 1. We wish to conduct the hypothesis…

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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3. School administrators are interested to see if computer science majors and engineering majors study the same amount of hours per week, on average. A random sample of 125 computer science majors returns a sample average of 25 hours per week and a sample standard deviation of 2 hours. Next, a random sample of 144 engineering majors returns a sample average of 22 hours with a sample standard deviation of 3 hours.
Instructor-created question E Question Help Course Note Packet Chapter 9 Page 8 and 10 How do professionals stay on top of their careers? Of 1,000 surveyed members of a business networking website, 580 reported that they engaged in professional networking within the last month. At the 0.01 level of significance, is there evidence that the proportion of all site members who engaged in professional networking within the last month is different from 55%? State the null and alternative hypotheses. Hn На Calculate the test statistic. ZSTAT =O (Type an integer or a decimal. Round to two decimal places as needed.) What is the p-value? The p-value is (Type an integer or a decimal. Round to three decimal places as needed.) State the conclusion of the test. V the null hypothesis. There is V evidence conclude that the proportion of all site members who engaged in professional networking within the last month is different from 55%.
Compare statistical testing with legal methods used in a U.S. court setting. Then discuss the following topics in class or consider the topics on your own. Please write a brief but complete essay in which you answer the following questions. (a) In a court setting, the person charged with a crime is initially considered to be innocent. The claim of innocence is maintained until the jury returns with a decision. Explain how the claim of innocence could be taken to be the null hypothesis. Do we assume that the null hypothesis is true throughout the testing procedure?What would the alternate hypothesis be in a court setting?(b) The court claims that a person is innocent if the evidence against the person is not adequate to find him or her guilty. This does not mean, however, that the court has necessarily proved the person to be innocent. It simply means that the evidence against the person was not adequate for the jury to find him or her guilty. How does this situation compare with a…
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I need the bull & alternative hypotheses, test statistic, critical value , & conclusion Thankyou so much
A person purchased a slot machine and tested it by playing it 1,172 times. There are 10 different categories of outcomes, including no win, win jackpot, win with three bells, and so on. When testing the claim that the observed outcomes agree with the expected frequencies, the author obtained a test statistic of χ2=9.168. Use a 0.05 significance level to test the claim that the actual outcomes agree with the expected frequencies. Does the slot machine appear to be functioning as expected? 1. what is the test statistic 2. What is the critical value 3. State the conclusion.
In hypothesis testing, if the test statistic is negative, this means the sample statistic is larger than the claimed population parameter. O we call the initial claim being tested about the population an alternative hypothesis. the "P" in P-value stands for "personal." O it is necessary to know the population size in order to compute the test statistic. O results that are statistically significant may or may not be practically important (or practically significant).
You may need to use the appropriate appendix table or technology to answer this question. Consider the following hypothesis test. H0: ?1 − ?2 ≤ 0 Ha: ?1 − ?2 > 0 The following results are for two independent samples taken from the two populations. Sample 1 Sample 2 n1 = 40 n2 = 50 x1 = 25.1 x2 = 22.8 ?1 = 5.9 ?2 = 6 (a) What is the value of the test statistic? (Round your answer to two decimal places.) (b) What is the p-value? (Round your answer to four decimal places.) (c) With ? = 0.05, what is your hypothesis testing conclusion? Reject H0. There is sufficient evidence to conclude that ?1 − ?2 > 0. Do not Reject H0. There is sufficient evidence to conclude that ?1 − ?2 > 0. Do not reject H0. There is insufficient evidence to conclude that ?1 − ?2 > 0. Reject H0. There is insufficient evidence to conclude that ?1 − ?2 > 0. I need help with parts A and B

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