Aubrey Stevenson is running for senior class president at Degrassi Community Schools, and he wants to know where the election stands. Let p be the proportion of the students who will vote for Mr. Stevenson. Based on a random sample of 175 students from the school, 103 of them have indicated that theywill vote for Mr. Stevenson. Using this data, test the null hypothesis that p=D0.5 versus the alternative that p> 0.5 at the alpha = 0.1 level. What is the p-value and conclusion of this test? %3D p-value = 0.0096; Reject the null hypothesis p-value = 0.0096; Fail to reject the null hypothesis p-value = 0.019; Reject the null hypothesis p-value = 0.019; Fail to reject the null hypothesis %3D

Aubrey Stevenson is running for senior class president at Degrassi Community Schools, and he wants to know where the election stands. Let p be the proportion of the students who will vote for Mr. Stevenson. Based on a random sample of 175 students from the school, 103 of them have indicated that theywill vote for Mr. Stevenson. Using this data, test the null hypothesis that p=D0.5 versus the alternative that p> 0.5 at the alpha = 0.1 level. What is the p-value and conclusion of this test? %3D p-value = 0.0096; Reject the null hypothesis p-value = 0.0096; Fail to reject the null hypothesis p-value = 0.019; Reject the null hypothesis p-value = 0.019; Fail to reject the null hypothesis %3D

Name: 21 22 23 24 25 26 27 28E VIEW LISTAubrey Stevenson is running for sen
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: 21 22 23 24 25 26 27 28E VIEW LISTAubrey Stevenson is running for senior class president at DegrassiCommunity Schools, and he wants to know where the election stands. Let pbe the proportion of the students who will vote for Mr. Stevenson. Basedon a

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

1. Calculate r2 2. Interpret r2 in the context of this research. How large is this effect (small, medium, large)? 3. Make an statistical decision about the null using alpha =.05. Will you reject or retain the null based on your data? 4. Provide a conclusion of the data using Descriptive statistics and the context of the research.
Molly works for a meat producer, and she needs to determine whether containers of ground beef have the correct fat content. She obtains a random sample of 120 containers of ground beef and finds that 84 percent have the correct fat content. Molly then conducts a hypothesis test of H0:p=0.80H0:p=0.80 versus Ha:p≠0.80Ha:p≠0.80 and calculates a test statistic of 1.10 with a pp-value of 0.273. Which of the following best represents the meaning of the pp-value? If the population proportion is 0.84, the probability of observing a sample proportion of 0.80 is 0.273. A If the population proportion is 0.84, the probability of observing a sample proportion of at least 0.04 less than 0.84 is 0.273. B If the population proportion is 0.80, the probability of observing a sample proportion within 0.04 of 0.80 is 0.273. C If the population proportion is 0.80, the probability of observing a sample proportion at least 0.04 greater than 0.80 is 0.273. D If the…
The average national salary is 45,000 (in this example, 45 represents 45,000). I take a sample of 14 individuals in San Angelo and measure their average salary and obtain the following data: Individual 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Salary 45 56 60 65 60 63 54 51 27 29 34 35 35 37 Conduct a test (at an alpha of .05) to answer whether or not San Angelonian’s salary is significantly greater than the national average. Null (H0): ________________________________ Alternative (Ha): ________________________________ Degrees of freedom (from calculation/Jamovi): ____________
In a study with a non-directional hypothesis... a. There is a single rejection region with an area that corresponds to the alpha level. b. There are two rejection regions that have the same area that adds up to the alpha level. c. There are two rejection regions that have the same area that adds up to the p-value. d. There is a single rejection region with an area that corresponds to the p-value.
Two separate samples are selected from the same population. Each have an n=8. Both samples receive a different treatment. After the treatment, the first sample has SS=16 and the second sample has SS=24. With a mean of 3 for the first group and mean of 6 for the second group, compute the t statistic. State the conclusion of these findings.
A researcher wanted to determine if car preference was related to city of birth. So, she polled 200 people who were born in either Detroit or Tokyo and asked them which car manufacturer they preferred. The data are below. Conduct the appropriate χ2 statistical test using an alpha level of .05 and the eight steps of hypothesis testing. (NOTE: You do not have to use the correction equation if df=1) Chevy Toyota Detroit 75 25 Tokyo 15 85
Dr. Ingrid is conducting an experiment to see whether time spent reading is related to poor vision. To do so, she creates three groups and randomly assigns 17 participants to each: the first group reads for 30 min a day, the second group reads for 1hr a day, and the third group reads for 1.5 hrs a day. Dr. Ingrid plans on using a one-way ANOVA to analyze the results of her experiment. If Dr. Ingrid has set alpha to .01, what will be her critical value of F?
If I calculate a z test statistic of 4.84, and my α=0.05, what decision should I make about the hypothesis? (Calculate the p-value for a 2-sided test to make your decision.)
Normally only about 19% of people who try to quit smoking succeed, but sellers of a motivational tape claim that listening to their recorded messages can help people quit (i.e., more than 19% of the people who use the tapes will successfully quit). Let p represents the percentage of people who have listened to the recorded messages and have successfully quit. Match the appropriate null and alternative hypotheses, based on the sellers' claim. H,: p = 0.19 p> 0.19 p2 0.19 ps 0.19 p 0.19 p2 0.19 ps 0.19 p < 0.19 Op- 0.19 Do you consider a Type I or Type Il error a more serious mistake here? Why? Your answer should make it clear what Type I and Il errors are in this context.
Refer to Exercise 8.S.1. Compare the before and after populations using a t test at α = 0.05. Use a nondirectional alternative.
You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly different from 62% at a level of significance of a = 0.05. According to your sample, 27 out of 50 potential voters prefer the Democratic candidate. a. For this study, we should use z-test for a population proportion b. The null and alternative hypotheses would be: Ho: pv = 0.62 O O H₁: pv # OF c. The test statistic z O O 0.62 ✓(please enter a decimal) f. Based on this, we should reject g. Thus, the final conclusion is that (Please enter a decimal) = -1.165 (please show your answer to 3 decimal places.) d. The p-value = 0.1248 x (Please show your answer to 4 decimal places.) e. The p-value is > ✓ a 1x the null hypothesis. O The data suggest the populaton proportion is significantly different from 62% at a = 0.05, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is different from 62% the population proportion is…
A decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 68%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H, and the alternative hypothesis H that we would use for this test. H: 0 O