You may need to use the appropriate appendix table or technology to answer this question.A magazine conducts an annual survey in which readers rate their favorite cruise ship. All ships are rated on a 100-pointscale, with higher values indicating better service. A sample of 39 ships that carry fewer than 500 passengers resulted inan average rating of 85.36, and a sample of 44 ships that carry 500 or more passengers provided an average rating of81.70. Assume that the population standard deviation is 4.55 for ships that carry fewer than 500 passengers and 3.97 forships that carry 500 or more passengers.(a) What is the point estimate of the difference between the population mean rating for ships that carry fewer than500 passengers and the population mean rating for ships that carry 500 or more passengers?(Use smaller cruise ships - larger cruise ships.)(b) At 95% confidence, what is the margin of error? (Round your answer to two decimal places.)(c) What is a 95% confidence interval estimate of the difference between the population mean ratings for the two sizesof ships? (Use smaller cruise ships - larger cruise ships. Round your answers to two decimal places.)to

Given, Sample-1) sample size = n1 = 39 sample mean = x¯1 = 85.36 Population standard deviation =…

Answered: A magazine conducts an annual survey in…

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 study reported on essential organic molecules and a Normal model can be used to describe these levels in adults. If the mean is 194 mg/dL and a standard deviation is 28, complete the following questions. a) Draw and label the Normal model. b) What percent of adults do you expect to have this essential organic molecule, cholesterol, levels over 210 mg/dL? c) What percent of adults do you expect to have cholesterol levels between 150 and 170 mg/dL? d) Estimate the interquartile range of cholesterol levels. IQR=___________mg/dL e) Above what value are the highest 15% of adults' cholesterol levels? ___________mg/dL
Use z-scores to make the following comparison between students. a. Claudia has a score of 61. Her class had a mean score of 74 and a standard deviation of 4 . Convert Claudia's score to a z- score. b. Isabella has a score of 79. Her class had a mean test score of 82 and a standard deviation of 2. Convert Isabella’s score to a z-score. c. Based on the z-scores, which student did better on their test compared to their class (“had a better relative position”)?
In a survey, 80% of the voters support a particular referendum. If 30 voters are chosen, find the standard deviation of the number of voters who support the referendum.
Find the standard deviation of the following data :49,63,46,58,52,60,54
Statewide, the population as a whole watches 6.2 hours of TV per day. A random sample of 1017 senior citizens in the state reports watching an average of 5.9 hours per day, with a standard deviation of 0.7. is the difference significant
Total enrollment in the Kalamazoo Public Schools have a mean and standard deviation of 11,957 and 13, respectively. The district expects growth in the next five years, so every observation in the dataset is multiplied by 1.5. What will the new mean be? 1) 7,971.33 2) 1.5 3) 11,957 4) 17,935.5 5) 11,958.5
In the United States, egg sizes are set by the Department of Agriculture. A "large" egg, for example, weighs between 57 and 64grams. Suppose the weights of eggs produced by hens owned by a particular farmer are approximately normally distributed with a mean of 55.8 grams and a standard deviation of 7.5 grams. What proportion of these eggs weigh less than 50grams? What percent of these eggs would be classified as large?
Based on data from the 2000 Census the average age of a Baldwin County, Alabama resident is 39 years with a standard deviation of 22. 6 . The data is normally distributed. The median age, in years, is: Group of answer choices 23 29 39 20
A company produces different types of drinks. It has been observed that the amount of drink in a bottle is normally disributed with a mean of 500 ml and a standard deviation of 4.75 ml. What percentage of the drink bottles contains 505 to 513 ml
A luxury furniture manufacture will make custom furniture for their customers. Pricing is based on the number of hours of skilled labor it takes to make a piece. The time it takes to make a custom couch is normally distributed with an average of 280 hours and a standard deviation of 40 hours. What percent of custom couches take 255 hours or less to make? How long would it take to build a couch that is in the 95th percentile?
A mountain climber plans to buy some ropes to use as a lifeline. Which of the following would be a better one? Rope A: with a mean breaking strength of 500 LBS and standard deviation of 100 LBS or Rope B: with a mean breaking strength of 500 LBS and standard deviation of 10 LBS Explain
A truck is loaded with cartons of eggs that weigh an average of 1.8 pounds each with a standard deviation of 0.2 pound. A histogram of these weights appears mound-shaped and symmetric. What proportion of the cartons weigh less than 1.4 pounds? Select one: a. 5% b. 2.5% C. 95% d. 68%

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