You may need to use the appropriate appendix table or technology to answer this question.Sheer industries is considering a new computer-assisted program to train maintenance employees to do machine repairs. In order to fully evaluate the program, the director ofmanufacturing requested an estimate of the population mean time required for maintenance employees to complete the computer assisted training. Use 9.74 days as a planning value forthe population standard deviation. (Round your answers up to the nearest whole number.)(a) Assuming 95% confidence, what sample size would be required to obtain a margin of error of 1.5 days?(b) If the precision statement was made with 90% confidence, what sample size would be required to obtain a margin of error of 3 days?Need Help? Read ItWatch It

The population standard deviation is 9.74 days.

Answered: You may need to use the appropriate…

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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The picture show below is the original problem and the other questions needs to be answered as well for the original problem. read carefully and answer correctly. (a) Calculate the mean, median and mode of the above data set in the picture. Show your complete work. Compute a 5% trimmed mean for the data, and compare it with the mean computed in part (a). Does the trimmed mean more accurately reflect the Class Sizes for Intro Courses? What is the new mean, median and mode if 9 will be added to each class size? What is the new mean, median and mode if each class size will be reduced into half?
What is the standard deviation?
Please help me with the following question.
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
Calculate the following for the data below. Round to one decimal place. 370, 470, 340, 520, 330, 460 (a) Mean: (b) Sample standard deviation: (c) Population standard deviation:
A study was undertaken to determine whether there was a significant weight (in lb) loss after one year course of therapy for diabetes, and whether the amount of weight (in lb) loss was related to initial weight. The following table gives the initial weight (x) and weight after one year of therapy (y) for 16 newly diagnosed adult diabetic patients. a. Is a one-sided or two sided test needed here? b. What is the mean weight for each time period? c. What is the standard deviation for each time period? d. Which statistical test is appropriate to use on these data? e. Carry out the hypothesis test(s) in question in above d. Use α=0.01 f. Are the means statistically different? g. Find the 99% confidence interval for the difference of the two means on weight. Interpret your finding.
In the 1992 presidential election, Alaska's 40 election districts averaged 2038 votes per district for President Clinton. The standard deviation was 576. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2038 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 1842 votes for President Clinton. d. Find the probability that a randomly selected district had between 1997 and 2099 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
What is the relative frequency? Give your answer to two decimal places.
You may need to use the appropriate appendix table or technology to answer this question. Older people often have a hard time finding work. A research group reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job is given in the table below. (a) Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job. ———Weeks (b) At 95% confidence, what is the margin of error? (Round your answer to four decimal places.) ———Weeks (c) What is the 95% confidence interval estimate of the mean? (Round your answers to two decimal places.) ————-Weeks to ————- weeks.
please answer question 2 below
The SAT and ACT college entrance exam are taken by thousands of students each year. The mathematics portions of each of these exams produce scores that are approximately normally distributed. In recent years, SAT mathematics exam scores have averaged 480 with standard deviation 100. The average and standard deviation for ACT mathematics scores are 18 and 6, respectively. a. An engineering school sets 550 as the minimum SAT math score for new students. What percentage of students will score below 550 in a typical year? b. What score should the engineering school set as a comparable standard on the ACT math test?
Calculate the 95% margin of error in estimating a population mean for the following values. (Round your answer to three decimal places.) 30,² = 1.2 n =

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