4. Do male and female school superintendents earn the same pay? Salaries for random samples ofmale and females in a certain metropolitan area are shown below. At 0.01 level of significance, werethe mean superintendents salaries lower for women than men?114,000115,024115,598108,400109,900120,352118,000Men121,42194,675128,332 123,484110,00099,703113,611 112,455111,280 120,118112,280 124,163123,814102,181Women94,94091,90391,993113,611Clearly formulate and describe the hypotheses using non-technical language, show your work includingany equation(s) used, and finally provide a conclusion in a non-technical language.

Let , denote the true means for men's and women's salaries. As the samples are less than 30 and the…

Answered: 4. Do male and female school…

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. What is the median? B. What is the mean? c. What is the precise median?
1. What is the mean BMI of this population? 2. How do these adults’ BMI value stack up against the rest of the country? 3. Nationally, 47% of adults in the US have hypertension (see the CDC article for more details). Does this population have a significantly lower percentage of adults with hypertension? Use 0.01.
2. The following data set belongs to a sample: 1418 -1088 -16 Calculate the mean, median, and mode
3. What is the sample mean for the following sample of scores? Scores: 1, 2, 5, 4
2. Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed in PGA tournaments are shown in the following table (Golfweek, February 14, 2009, and February 28, 2009). Suppose you would like to determine if the mean score for the first round of a PGA Tour event is significantly different than the mean score for the fourth and final round. Does the pressure of playing in the final round cause scores to go up? Or does the increased player concentration cause scores to come down? Player First Round Final Round Sleve McDichael 72 72 Onson Sweemey 68 68 Darryl Archideld 72 72 Anatoli Smorin 68 68 Rey McScriff 73 73 Glenallen Mixon 69 69 Mario McRlwain 74 74 Raul Chamgerlain 69 73 Mike Sernandez 70 73 Tony Smehrik 71 69 Player First Round Final Round Bobson Dugnutt 73 75…
Pages were randomly selected from The Bear and the Dragon by Tom Clancy, Harry Potter and the Sorcerer's Stone by J.K. Rowling, and War and Peace by Leo Tolstoy. The Flesch Reading Ease scores for those pages are listed below. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. Clancy 58.2 73.4 73.1 64.4 72.7 89.2 43.9 76.3 76.4 78.9 69.4 72.9 Rowling 85.3 84.3 79.5 82.5 80.2 84.6 79.2 70.9 78.6 86.2 74.0 83.7 Part (B) Identify the test statistic and the P-value The test statistic F= The P-value is notation.) Tolstoy 69.4 64.2 71.4 71.6 68.5 51.9 72.2 74.4 52.8 58.4 65.4 73.6 (Round to four decimal places.) (Round to six decimal places. Do not use scientific
what is the median for parents?
A professor wants to know which type of instructional mode students had more satisfaction. The professor randomly selected n = 5 students from each of the following types of classes: online only, hybrid, and face-to face only. Student were given a satisfaction survey. Are their differences in student satisfaction among the different instructional modes. The data are below: Online Hybrid Face-to-Face 3 3 4 3 3 1 3 1 3 2 2 2 2 1 3 Calculate Mean Square Within Group (MSWG)
4 Ms. Lisa Monnin is the budget director for Nexus Media Inc. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. Sales ($) Audit ($) 125 137 147 162 136 142 128 107 130 141 141 108 140 At the 0.01 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? Click here for the Excel Data File 1. State the decision rule. (Round your answer to 3 decimal places.) Reject Ho if t> 2. Compute the pooled estimate of the population variance. (Round your answer to 2 decimal places.) Pooled variance 3. Compute the test statistic. (Round your answer to 3 decimal places.) Value of the test statistic 4. State your decision about the null hypothesis. (Click to select) Ho: H₂ Ha 5. Estimate the p-value. (Round your answers to 3 decimal places.) p-value (Click to select) Sales 125 137 147 162 136 142 Audit 128 107 130 141 141 108 140
Find the Mean, Median, and Mode for Ungrouped and Grouped Data of the given data set 18 26 19 23 19 22 24 24 19 15 22 12 25 22 22 24 22 25 24 19 18 23 14 16 22 23 19 20 14 23 24 35 19 17 20 17 14 12 24 20
3. Consider the following set of data, which represents a simple random sample of heights (in inches) of full-grown corn plants in Horseyetown, WI: (78.5, 88.8, 76.2, 73.0, 79.5, 66.9, 72.4, 86.6, 67.6, 73.5, 72.6, 72.6, 80.0, 69.1, 79.1, 73.9, 72.3, 83.3, 64.3, 69.1) Round your answers to 2 decimal places. A. Calculate the range. B. Calculate the sample mean. C. Calculate sample statistics to estimate the population standard deviation and variance of all full-grown corn plants in Horseyetown, WI.
8. a. Five group of students that consist of 10, 8, 11, 13 and 9 individuals. They consumed the mean average time in computer programming were 18, 33, 11, 42 and 53 hours respectively. Find the overall average time consuming the student groups in computer programming. b. Twelve homes in one city were underinsured on the average of $5,000, 24 homes in another city were underinsured on the average of $6,200 and 14 homes in a third city were underinsured on the average of $6,900. Find the overall average amount of the underinsured homes. c. A writer earns a mean average of $15.00 per hour for 4 hours of work, $17.50 per hour for 2 hours of work, $13.33 per hour for 3 hours and $14.00 per hour for 1 hour. What is the overall average earning per hour of the writer?

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