B. Below is the number of students taking up statistics from each department. A seminar will be conducted outside the campus. 4. At 3% margin of error with 50% response rate, how many participants should be taken as samples? (Use RAOSOFT) 5. Complete the table Course Number of students 120 89 Percent COA СВЕ CAS 57 34 COED Total 300

B. Below is the number of students taking up statistics from each department. A seminar will be conducted outside the campus. 4. At 3% margin of error with 50% response rate, how many participants should be taken as samples? (Use RAOSOFT) 5. Complete the table Course Number of students 120 89 Percent COA СВЕ CAS 57 34 COED Total 300

Name: B. Below is the number of students taking up statistics from each dep
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Description: B. Below is the number of students taking up statistics from each department. A seminar will beconducted outside the campus.4. At 3% margin of error with 50% response rate, how many participants should be taken assamples? (Use RAOSOFT)5. Complete th

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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A measure of tire wear is the percentage of tire groove lost by the tire since new. A senior JJ research student tried to estimate the average percentage groove lost for JJ5 tires after 30000 miles. She randomly selected 15 tires with 30000 miles of wear on each tire. These are the percentage of tire groove lost on each: 35.7, 39.2, 36.1, 28.1, 24.0, 28.7, 25.9, 11.5, 15.2, 19.9, 16.1, 20.9, 23.7, 23.1, 23.3 Percentage groove lost after 30000 miles is known to be normally distributed with an unknown mean of u and an unknown standard deviation o. a) Calculate the sample mean for this data.
A company wants to determine the frequency of the occurrence of invoice error. Suppose that in a sample of 200 sales invoices, 10 contain errors. construct a 95% CI for the proportion error.
According to an article in Newsweek, the natural ratio of girls to boys is 100:105. In China, the birth ratio is 100:114 (46.7% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study. In this study, you count the number of girls and boys born in 150 randomly chosen recent births. There are 64 girls and 86 boys born of the 150. Based on your study, do you believe that the percent of girls born in China is 46.7? Conduct a hypothesis test at the 5% level.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)State the distribution to use for the test. (Round your standard deviation to four decimal places.)P' ~ What is the test statistic? (Round your answer to two decimal places.) What is the p-value? (Round your answer to four decimal places.) Construct a 95% confidence interval…
To the nearest whole number, what percent of respondents did not choose Dominos or Marcos as their favorite pizza place?
All of the following graphs can be used for categorical variables except? Dot plot Bar Graph Pie Chart Pareto Chart
The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg. and thạt of the girls is 55 kg. Find the number of girls in the class.
A company wants to determine the frequency of the occurrence of invoice errors. Suppose that in a sample of 100 sales invoices, 10 contain errors. construct a 90% CI for the proportion error.
In a 4 point grade system, an A is worth 4 points, a B is worth 3 points, a C is worth 2 points and a D is worth 1 point. No points are awarded for an F. Last semester Tanya received a B in a 4 credit hour course, an A in a three credit hour course, a C in a three credit hour course, and an A in another three credit hour course. Grade point average (GPA) is calculated as a weighted average using the credit hours as weights and the number of points corresponding to the grades as pieces of data. Calculate Tanya's GPA for the previous semester. Round your answer to the nearest hundredth and explain in complete sentences your process. Show all work.
How many samples must be considered from a population of 28,000 students, if 5% margin of error is to be used? 1. Solution: 2. Considering the 5800 enrollees in the College of Education, a researcher would like to make a study with 97.25% precision. How many samples must be taken? Solutions: 3. Determine the number of sample that must be taken from each year level, if 95% decision is considered. NUMBER OF STUDENTS YEAR LEVEL SOLUTION SAMPLE ENROLLED 5,800 6,980 First Year Second Year Third Year 12,600 Fourth Year 14,750 TOTAL SAMPLE SIZE Solutions:
According to an article in Newsweek, the natural ratio of girls to boys is 100:105 . In China, the birth ratio is 100:116 ( 46.3% girls). Suppose you don’t believe the reported figures of the percent of girls born in China. You conduct a study. In this study, you count the number of girls and boys born in 100 randomly chosen recent births. There are 42 girls and 58 boys born of the 100 . Based on your study, do you believe that the percent of girls born in China is 46.3 ? A.)What is the test statistic? Round your answer to three decimal places. (z / t ) = B.) What is the p -value? Round your answers to four decimal places. p -value = C.) Let α=0.05 . Decision: (Reject the null hypothesis / do not reject the null hypothesis) Reason for decision: ( a < p-value / a > p-value) Conclusion: There is (insufficient/ insufficient) evidence to conclude that the percentage of girls born in China is different from 46.3% .
A recent debate about where in the United States skiers believe the skiing is best prompted the following survey. We are interested in testing to see if the best ski area is independent of the level of the skier. Use the data below to answer the questions. U. S. Ski Area Beginner Intermediate Advanced Tahoe 20 30 40 Utah 10 30 60 Colorado 10 40 50 a. What is the total number of skiers in Tahoe? b. What is the total number of advanced sk s? c. What is the expected number of advanced skiers in Tahoe? Round to two decimal places.
A survey of 100 students are taken. 32 Yes and 68 no. Find the point estimate of p and 96% CI.