In a program designed to help patients stop smoking, 158 patients were given sustained care, and 82.9% of them were no longer smoking after one month. Use a 0.01 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p= 0.8 H;:p<0.8 О В. Но: р30.8 H,: p>0.8 O C. Ho: p#0.8 H1: p= 0.8 O D. Ho: p= 0.8 H1: p#0.8

In a program designed to help patients stop smoking, 158 patients were given sustained care, and 82.9% of them were no longer smoking after one month. Use a 0.01 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p= 0.8 H;:p<0.8 О В. Но: р30.8 H,: p>0.8 O C. Ho: p#0.8 H1: p= 0.8 O D. Ho: p= 0.8 H1: p#0.8

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

On a state driver’s test, about 45% pass the test on the first try. We want to test if more than 45% pass on the first try. Fill in the correct symbol (=, ≠, ≥, <, ≤, >) for the null and alternative hypotheses
Test Conduct a hypothesis test for the following problem: A medical researcher says that at least 20% of US adults are smokers. In a random sample of 200 uS adults, 18.5% say that they are smokers. At a =0.01 significance level, is there enough evidence to reject the researcher's claim? Ho: 0.20 p> 0.20 p 0.20 Claim: Select an answer What is the level of significance given in this problem? What is the critical value for this sample? What is the test statistic for this sample? What is the rejection region for this sample?
Graduation Rates. Use the technology of your choice to perform the tests of hypotheses in parts (a) and (b).
Many questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. Do a minority of Michigan residents clear snow from sidewalks before 9 am after snow has fallen?For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________
A popular uprising that started on January 25, 2011 in Egypt led to the 2011 Egyptian Revolution. Polls show that about 69% of American adults followed the news about the political crisis and demonstrations in Egypt closely during the first couple weeks following the start of the uprising. Among a random sample of 30 high school students, it was found that only 17 of them followed the news about Egypt closely during this time. (Source: Gallup Politics, Americans' Views of Egypt Sharply More Negative, data collected February 2-5, 2011).
The following are the average grade of a sample of 20 Senior High School students for the first semester. Test the claim that the average grade of the students is LESS THAN 90. Use 5% level of significance. 91 88 93 95 95 85 89 93 89 91 91 92 89 89 84 87 88 88 89 93
Consider the following set of hypotheses and determine whether or not they are valid. If they are valid, then specify what type of hypothesis test is being carried out. If they are not valid, then specify why they are not valid. Be as specific as possible. Hou= 23 HaH = 27
When conducting a hypothesis test, we hope to avoid commiting a type 1 error, which is: 1. Not as bad as committing a type 2 error 2. rejecting a null hypothesis when it is true 3. rejecting the alternate hypothesis when it is true 4. accepting the null hypothesis when the alternate hypothesis is true
Write the null and its alternative hypotheses and directional hypotheses in words and in symbols, for each situations below.
A magazine presented a lesson in hypothesis testing carried out by medical students in a biostatistics class. Students were blind-folded and then given a red-colored or yellow-colored gummy bear to chew. (Half the students were randomly assigned to receive the red gummy bear and half to receive the yellow bear. The students could not see what color gummy bear they were given.) After chewing, the students were asked to guess the color of the candy based on the flavor. Of the 137 students who participated in the study, 94 correctly identified the color of the gummy bear. Complete parts a through c below. a. If there is no relationship between color and gummy bear flavor, what proportion of the population of students will correctly identify the color? (Type an integer or a decimal. Do not round.) b. Specify the null and alternative hypotheses for testing whether color and flavor are related. Let p be the true proportion of students who are able to correctly identify the color of the gummy…
21a. Step 1: Which of the following is the correct set of hypotheses?A. H0: Cravings and relapse are not independent; and H1: Cravings and relapse are independent B. H0: Cravings and relapse are independent; and H1: Cravings and relapse are not independent C. H0: u1 = u2 = u3 = u4; and H1: At least one of the categories will be different than the others. 21b. Expected frequencies for: (round answers to 2 decimal places) Cravings-Yes/Relapse-Yes fe = _______ Cravings-Yes/Relapse-No fe = ________ 21c. Expected frequencies for: (round answers to 2 decimal place) Cravings-No/Relapse-Yes fe = _________ Cravings-No/Relapse-No fe = __________
Bill, a psychologist, has developed a new aptitude test. He was able to show (through a somewhat dubious study) that 60% of the public passed the test. A second psychologist, Tamera, wants to recreate this study. She believes the actual percentage is less than 60%. A random sample of 320 people took the test, and 182 passed. a) State the null and altemate hypotheses to test the claim that the actual percentage is different than 60%. Ho: p = HA: p# b) What is the point estimate for the proportion of the public that passed the test? Point Estimate = c) Using a standard error of 0.0274, what is the test statistic? Test Statistic = d) Compute the p-value. The p-value- The p-value « .001 e) Should Tamera reject or fail to reject the null hypothesis?