QUESTION 1A recent study of over 1000 parents on cyberbullying showed that a 95% confidence interval of proportion of kids whofaced bullying in social media sites and apps is (0.1200, 0.1433). Find the sample proportion of kids who faced bullying insocial media sites and apps. Round your answer to four decimal places.QUESTION 2The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standarddeviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean isless than 4.5 minutes? Round your answer to four decimal places.QUESTION 3The daily electrical energy consumption (in Watts) during July for a random sample of households was recorded. Themean was 3399 W and the standard deviation was 316 W. Assume the underlying distribution of the consumption isnormal. Find the marging of error E of the 95% confidence interval for the mean daily electrical energy consumptionduring that month. Round your answer to two decimal places.الممسوحة ضوئيا بـ ICS CamScanner

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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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Out of 57 high school female athletes, data was collected on how much they were able to bench press. From this data we get x=79.9,Q1=70, Q2=80, and Q3=90. Determine if the data distribution is skewed or symmetric. Give 2 reasons to back up your answer.
Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.
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A survey was conducted that asked 1013 people how many books they had read in the past year. Results indicated that x=10.3 books and s=16.6books. Construct a 90% confidence interval for the mean number of books people read. Interpret the interval. Construct a 90% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to two decimal places as needed.) A. There is a 90% probability that the true mean number of books read is between ___ and ____ B. There is 90% confidence that the population mean number of books read is between ___ and ____. C. If repeated samples are taken, 90% of them will have a sample mean between ___ and ___.
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The median of a sample with data values of 8,19,12,17,16 is?
A survey was conducted that asked 963 people how many books they had read in the past year. Results indicated that x=14.7 books and s=17.8 books. Construct a 90% confidence interval for the mean number of books people read. Interpret the interval.Construct a 90% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete your choice.(Use ascending order. Round to two decimal places as needed.)A. If repeated samples are taken, 90% of them will have a sample mean between ___ and ____ B. There is a 90% probability that the true mean number of books read is between ____ and ___ C. There is a 90% confidence that the population mean number of books read is between ___ and ___

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