Question threeJohn and his friend were recently having a heated discussion about the number of menliving in a western parish who possibly cared for children that are not biologically theirsduring 2020. Assume that a survey of the parish's population revealed that the averagenumber of cases and the standard deviation was 5,000 and 6000 in 2019, respectively.John and his friend do not believe that the population average is correct. Assume that asurvey based on a sample of the 800 people was conducted and found that the averagenumber of cases in the western parish was 10,000 over the 12 months period. Conducta hypothesis test, using a 5% significance level to determine if the average number ofcases is actually higher based on the sample data.

Given that, John and his friend were recently having a heated discussion about the number of men…

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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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Question 16: give the conclusion.
Safari .. 1:38 PM 9 49% O Hauisha chen gnd 2/p4/21 Stats RM Problem 1 Set Sam scored a 27 on his ACT last back in October. The mean ACT score for his class was 23, with a standard deviation of 2. Assuming a normal (bell- shaped) distribution for students' scores, answer the following: 1) What percentage of students would you expect to have scored higher than Sam? 50 34 (34 133D in 13.3 25/27 2) What percentage of students should have scored between Sam's score and the mean? 4B00 44.5 3) Jessica scored a 21 on the ACT? What percentage of students would you 2. 3% expect to have scored lower than Jessica? 5D.0 (34.0)
QUESTION 10 You hypothesize that people in stats classes are happier than people in all other classes. You compare happiness scores in three of your classes: Statistics, Developmental Psychology, and Social Psychology. In Statistics there are 15 students and the mean happiness rating is 23.1 with a standard deviation of 9.78. In Developmental Psychology there are 15 students and the mean happiness rating is 24.4 with a standard deviation of 2.92. In Social Psychology there are 15 students with a mean rating of 17.7 and standard deviation of 8.46. The sum of squares between groups is equal to 384. The sum of squares within groups is equal to 2461. What is the Mean of Squares within samples? Round to the nearest hundredths place (two decimal places).
Question 3 The average score of all sixth graders in school District A on a math aptitude exam is 75 with a standard deviation of 8.1. A random sample of 80 students in one school was taken. The mean score of these 100 students was 71. Does this indicate that the students of this school are significantly different in their mathematical abilities than the average student in the district? Use a 5% level of significance.
QUESTION 40 The results from a statisticS class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information: What grade is required in order to be in the top 20 percent? QUESTION 41 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information: What percentage of people received a grade between 89 and 957 QUESTION 42 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information What percentage of people received a grade of 94 or less? OUECTI Click Save and Submit to save and submit. Click Save All Answers to save alanswers.
Downloadable eTextbook ment FULL SCREEN PRINTER VERSION 1 BACK NEXT Chapter 09, Section 9.2, Problem 025a The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.35 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. Find the p-value for the test of hypothesis with the alternative hypothesis that the mean life of these batteries is less than 45 months. Round your answer to four decimal places. Will you reject the null hypothesis at a = 0.025? the tolerance is +/-2% Question Attempts: 0 of 2 used SAVE FOR LATER SUBMIT ANSWER powered by MapleNet Policy 2000-2020 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons, Inc. Version 4.24.20.1 tv hulu W
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Question 3 Subparts d, f , h, i Thank you
Problem 2. Assume the mean income per person in the United States is $50,000, and the incomes follow a normal distribution. A random sample of 26 residents in Atlanta, GA had a mean of $60,000 with a standard deviation of $10,000. You are interested in whether the average income in Atlanta is higher than the national average. a. Setup the appropriate null and alternative hypotheses. b. Construct the relevant test statistic. c. Test the hypotheses at the 0.05 significance level and state your conclusion.
Question 1 An IQ test is an assessment that measures a range of cognitive abilities and provides a score that is intended to serve as a measure of an individual's intellectual poten- tial and ability. The following data set gives a score of IQ test for 40 employees in Company SM. Given the mean of this sample is 63.5 and the standard deviation is 12.33. (a) (b) (c) 88.9 k 77.0 76.5 75.9 75.4 75.3 74.2 73.5 72.9 72.4 72.1 70.3 70.1 67.9 67.0 66.6 66.3 65.6 64.3 63.0 61.1 61.0 60.9 60.8 58.9 58.7 58.3 58.2 57.6 55.4 54.8 54.7 54.7 54.7 54.2 53.0 49.3 46.0 14.1 Determine the value of k. Select a suitable graphing approach for this data and plot the data. Indicate the distribution of the data. Determine the median and mode. (d) By removing the smallest value (outlier), calculate the mean, median and mode. Compare these measures with the previous values before removing the outlier. Comment on these three measures in the presence of outlier.
QUESTION 11 You hypothesize that people in stats classes are happier than people in all other classes. You compare happiness scores in three of your classes: Statistics, Developmental Psychology, and Social Psychology. In Statistics there are 15 students and the mean happiness rating is 23.1 with a standard deviation of 9.78. In Developmental Psychology there are 15 students and the mean happiness rating is 24.4 with a standard deviation of 2.92. In Social Psychology there are 15 students with a mean rating of 17.7 and standard deviation of 8.46. The sum of squares between groups is equal to 384. The sum of squares within groups is equal to 2461. What is the F-ratio? Round to the nearest hundredths place (two decimal places).
Question 7 Data from the Bureau of Labor Statistics reports that the typical manufacturing worker in Wisconsin in 1997 earned a weekly salary of $424.20. Suppose you wanted to see if this were true just in the far Southeastern portion of the state. You obtain a sample of tax returns for manufacturing workers in Racine and Kenosha for the year 1997. Your sample consists of 54 workers and has a mean weekly salary of $432.69 with a standard deviation of $33.90 At a 90% confidence level test the claim that manufacturing workers in Racine and Kenosha had the same salary as workers across the state. What will be your critical value? A) 1.645 B) 1.96 C) 2.33 D) 2.575

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