Get an education: In 2012 the General Social Survey asked 844 adults how many years of education they had. The sample mean was 8.54 years wit tandard deviation of 8.58 years. Part: 0 / 2 Part 1 of 2 (a) Construct a 99% confidence interval for the mean number of years of education. Round the answers to two decimal places. A 99% confidence interval for the mean number of years of education is <μ<|

Get an education: In 2012 the General Social Survey asked 844 adults how many years of education they had. The sample mean was 8.54 years wit tandard deviation of 8.58 years. Part: 0 / 2 Part 1 of 2 (a) Construct a 99% confidence interval for the mean number of years of education. Round the answers to two decimal places. A 99% confidence interval for the mean number of years of education is <μ<|

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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ASK YOUR TEACHER At Burnt Mesa Pueblo, archaeological studies have used the method of tree-ring dating in an effort to determine when prehistoric people lived in the pueblo. Wood from several excavations gave a mean of (year) 1230 with a standard deviation of 30 years. The distribution of dates was more or less mound-shaped and symmetric about the mean. Use the empirical rule to estimate the following. (a) a range of years centered about the mean in which about 68% of the data (tree-ring dates) will be found between and A.D. (b) a range of years centered about the mean in which about 95% of the data (tree-ring dates) will be found between and A.D. (c) a range of years centered about the mean in which almost all the data (tree-ring dates) will be found between and A.D. MY NOTES
SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample? Round answer to nearest whole number.
Standardized tests: In a particular year, the mean score on the ACT test was 19.7 and the standard deviation was 4.2. The mean score on the SAT mathematics test was 518 and the standard deviation was 103. The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal places. Find the z-score for an ACT score of 23. Find the z-score for a SAT score of 466.
Contstruct a 95% confidence interval for the population mean length of time that people have lived in the city, town, or community where they live now.
First side of confidence interval: 6.823, 7.79, 7.73, or 8.51
A mandatory competency test for high school sophomores has a normal distribution with a mean of 350 and a standard deviation alo of 80. Use a graphing calculator and round the answers to the nearest whole number. Part: 0/2 Part 1 of 2 (a) The top 4.5% of students receive $500, what is the minimum score you would need to receive this award? The minimum score needed to receive the award is
How many computers? In a simple random sample of 145 households, the sample mean number of personal computers was 2.38. Assume the population do standard deviation is o=0.39. Part: 0 / 4 Part 1 of 4 (a) Construct an 80% confidence interval for the mean number of personal computers. Round the answer to at least two decimal places. An 80% confidence interval for the mean number of personal computers is
You want to find out the average monthly rent for a studio apartment in Los Angeles. Out of a sample of n = 100 you find the sample average rent to be ?̅ = $1275. Assume you know the population standard deviation for studios’ monthly rent to be σ = $180. Develop a 90% confidence interval estimate of the population average monthly rent for studio apartments in Los Angeles
The current speed limit is 60 mph. This sample of speeds was taken at 4pm on a Monday. Use the data to construct a 80% confidence interval estimate of the standard deviation for the population speeds. 60 62 62 65 56 62 54 61 60 61 69 58 66 what is the lower limit what is the upper limit
Starting salaries of 125 college graduates who have taken a statistics course have a mean of $42,486 and a standard deviation of $10,300. Using 99% confidence, find both of the following: A. The margin of error ?E B. The confidence interval for the mean μ:_____<μ<_____
Question H The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1261 chips and a standard deviation of 118 chips. (a) Determine the 28th percentile for the number of chocolate chips in a bag. (b) Determine the number of chocolate chips in a bag that make up the middle 96% of bags. (c) What is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies? (a) The 28th percentile for the number of chocolate chips in a bag of chocolate chip cookies is (Round to the nearest whole number as needed.) chocolate chips. (b) The number of chocolate chips in a bag that make up the middle 96% of bags is | (Round to the nearest whole number as needed. Use ascending order.) chocolate chips. to (c) The interquartile range of the number of chocolate chips is (Round to the nearest whole number as needed.) Enter your answer in each of the answer boxes. 11:59pm thase Options A0.50LA Type here to search