Assume that a sample is used to estimate a populationmean μ. Find the margin of error M.E. that correspondsto a sample of size 20 with a mean of 37.5 and astandard deviation of 8.1 at a confidence level of 95%.Report ME accurate to one decimal place because thesample statistics are presented with this accuracy.M.E.=Answer should be obtained without any preliminaryrounding. However, the critical value may be roundedto 3 decimal places.

Answer: - Given, sample size n = 20 , sample mean x = 37.5 The sample standard…

Answered: Assume that a sample is used to…

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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Average work for some employees is 98 hours per year. Use a random sample of 18 employees. The standard deviation is 5.6 hours. Check the claimthat it’s less than 100. Check the validity of this claim using 99% accuracy. Assume the variableis normally distributed. Round your final answers to the nearest 2 decimal places. Can you show your work on a dist. graph? Thank you!
From the population of 540, a sample of 60 induvidual is taken from this sample. Tge mean is found to be 6.2 and the standerd deviation is 1.368. Find the estimated standerd error of the mean. Construct a 96%confidence intervels for the mean
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This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway per hour and 85 miles per hour. (Assume the data set has a bell-shaped distribution.) 70 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whese speeds are between 55 miles Approximately% of vehicles travel between 55 miles per hour and 85 miles per hour.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately nothing% of vehicles travel between 65 miles per hour and 71 miles per hour.
The goal of the one-sample t-test is to: Group of answer choices describe the location of a score within a distribution compare the mean of a sample to the population mean. compare the means of two samples. compare the standard deviation of a sample to the standard deviation of the population.
Assume the cholesterol levels of an adult can be described by a Normal model with a mean of 183 mg/dL and a standard deviation of 27. Complete parts a through e. b) What percent of adults do you expect to have cholesterol levels over 190 mg/dL? enter your response here % (Round to two decimal places as needed.) Part 3 c) What percent of adults do you expect to have cholesterol levels between 150 and 160 mg/dL? enter your response here % (Round to two decimal places as needed.) Part 4 d) Estimate the interquartile range of cholesterol levels. IQR=enter your response here mg/dL (Round to the nearest integer as needed.) Part 5 e) Above what value are the highest 15% of adults' cholesterol levels? enter your response here mg/dL (Round to the nearest integer as needed.)
The mean SAT verbal score is 485, with a standard deviation of 97. Use the empirical rule to determine what percent of the scores lie between 485 and 679. (Assume the data set has a bell-shaped distribution.)
No. 2 only. Give interpretation of your answer...

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