Question 1- the concepts Professor Walters knows that the mean score on the midterm exam from all the years he has been teaching is 83%. Kennedy was in his most recent class, and his class's mean score on the final exam was 81%. Kennedy decided to run a hypothesis test to determine if the mean Score of his class was different than the mean score of the population. a = .01. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why? What are the null and alternative hypotheses in this case? Let's pretend that p was calculated, and p 0.005, should Kennedy reject or fail to reject the null hypothesis? Why? What should Kennedy's statement of conclusion be? (This circles back to what is being tested).

Question 1- the concepts Professor Walters knows that the mean score on the midterm exam from all the years he has been teaching is 83%. Kennedy was in his most recent class, and his class's mean score on the final exam was 81%. Kennedy decided to run a hypothesis test to determine if the mean Score of his class was different than the mean score of the population. a = .01. What is the mean score of the population? What is the mean score of the sample? Is this test one-tailed or two-tailed? Why? What are the null and alternative hypotheses in this case? Let's pretend that p was calculated, and p 0.005, should Kennedy reject or fail to reject the null hypothesis? Why? What should Kennedy's statement of conclusion be? (This circles back to what is being tested).

Name: Question 1– the conceptsProfessor Walters knows that the mean score o
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Question 1– the conceptsProfessor Walters knows that the mean score on the midterm exam from all the years he hasbeen teaching is 83%. Kennedy was in his most recent class, and his class's mean score onthe final exam was 81%. Kennedy decided to run

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

The first test a doctor would order to determine whether a person is infected with HIV (the virus that causes AIDS) is the ELISA test. It detects antibodies and antigens for HIV. A study in Statistical Science by J. Gastwirth estimated that, if the person is actually infected with HIV, this test produces a positive result 97.7% of the time. If a person is not infected with HIV, the test result is negative 92.6% of the time. According the the US Centers for Disease Control (CDC), an estimated 1.1 million Americans out of a population of 321 million were infected with HIV in 2015. Using the information above, determine the probability that a randomly selected person whose ELISA test is positive actually is infected with HIV? a. What is the probability that a randomly selected American is infected with HIV? b. Using the answer to part (a) and the conditional probabilities of positive and negative ELISA test results, fill out the contingency table below: ELISA Test Result…
1. In 1955, Life Magazine reported that a 25-year-old mother of 3 children, worked an average of 80 hours each week. Recently, some researchers have been studying whether the women’s movement has resulted in an increase in the work week hours for women (combining employment and at-home work). A study was done to find out if the mean work week has, in fact, increased. A random sample of 81 women were surveyed and the mean was 83 hours with a standard deviation of 10. Using a 95% confidence level, does the sample data support the researcher’s claim that the average number of weekly hours that women work, is greater than 80? a. What statistical test will you use to test this data ? b. State the null and alternative hypothesis. i. H0: ii. Ha: c. What are the confidence intervals? d. What is the value of the test statistic? e. What is the p-value? f. Circle/highlight the correct decision about the null hypothesis. Reject H0…
Empathy among police officers influences how they interact with citizens and the likelihood that they receive complaints. Gender differences in levels of empathy in the general population are not large but male and female officers have been shown to have different interaction styles with the public; this may be due to the different empathy levels. After sampling officers and measuring their levels of empathy you find the following data. Males Females n = 6 n = 9 M = 31 M = 45 SS = 490 SS = 680 If you were going to make gender comparisons like this, which option would be the correct choice? Write A or B in the box. [a] Option A. Independent-measures t-test Option B. Repeated-measures t-test
ample is QUESTION 2 Researchers conducted two surveys about teens are their use of social media. The first survey asked a random sample of 800 U.S. teens about their use of Instagram. A second survey asked the same questions to a random sample of 2253 Canadian teens. In these two studies, 73% of U.S. teens and 88% of Canadian teens said that they use Instagram. Use these results to answer the following questions about the proportion of U.S. and Canadian teens that use Instagram. (Round to the nearest whole hundredth as needed). What is the difference between the proportion of U.S. teens and the proportion of Canadian teens? The standard error for these two samples is Using a 99% confidence level, the lower limit is and the upper limit is QUESTION 3 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answ Relative Me Worksheet - Py...docx Reading - Mapp.pdf W ALK Letter -2.pdf Worksheet - W....docx W DIC. étv 12 目

You are comparing data from two similar experiments that have a mean of 53. Experiment A has a standard deviation of 3.4 and experiment B has a standard deviation of 1.5. What does this tell you about the data in the experiments?
A professor believes that his math students have different IQ than the average college students. He collected the IQ scores of 30 students in his class. Then, he compared it to the average IQ score of college students. Provided below is the data that the professor gathered.Sample:Mean: 103 Std. Dev: 7 N: 30 Population: Mean: 100 Std. Dev: 5 A). What is the type of test you will use? (z-test, single-sample t-test, paired-samples t-test, or independent samples t-test) and why (what information provided in the problem) B). What are the hypotheses (Be Specific)
3 see picture
I need help with questions 2 and 3
Last week Jenni had exams in Spanish and in Cognition. She scored 5 points above the mean on both exams. From this information, what can you conclude about the z-scores for Jenni’s two scores? a. Jenni will have a higher z-score for the exam with the lower mean. b. None of the other choices is correct. c. Jenni has identical z-scores for the two exams. d. Both of Jenni's z-scores are positive.
In a sample of n = 5, four subjects have scores that are 1 point above the mean each. The 5th subject’s score must be? 1 point above the mean 1 point below the mean 4 points above the mean 4 points below the mean
Which of the following is an example of doing inferential statistics? You calculate the average grade on an exam in a class of 5th grade math students to see if they did better or worse than last year. You lookup the median and the standard deviation of the age for the U.S. population from U.S. Census data. You use a sample of homes in Rancho Cucamonga to draw a conclusion about the mean home price for all Rancho Cucamonga homes. You compare the distributions of scores for two Social Science 10 classes to see which class did better on the exam.
The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25 and the sample statistics include n=1150 subjects with 265 saying that they smoked a cigarette in the past week. Find the value of the test statistic.