An estimate of the mean time taken by this group of workers is? The following histogram gives the times taken by a random sample of workers of a company tocomplete a specific task.Number of Workers109876LO433221010203040 50 60 70 80 90Time (min)

It is given that the histogram gives the times taken by a random sample or workers of a company to…

Answered: An estimate of the mean time taken by…

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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2/12 decide if a 90% T interval can be constructed about the population mean. If not, state the reason why.
The incubation time for a breed of chicks is normally distributed with a mean of 24 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs eventually hatch.) use the uploaded graph for reference a) 20 to 28 days b) 22 to 26 days c) 18 to 30 days
What conditions are necessary in order to use the dependent samples t-test for the mean of the difference of two populations?
A sample of 30 students at a local college were given a test consisting of 10 questions about current news events. Thedistribution of the number of correct answers given is recorded in the frequency column of the table. Questions that were notanswered were marked incorrect. The frequency represents how many of the 30 students who took the test got a certain numberof answers correct. For example, three students answered five questions correctly. Determine this mean number of points x, earned on the test. Give your answer precise to one decimal place
Weekly demand for a certain brand of a golf ball at The Golf Outlet is normally distributed with a mean of 35 and a standard deviation of 5. The profit per box is $5.00. Write an Excel formula that simulates the weekly profit: O = 5* RANDBETWEEN(5, 35) O = 5*35* NORMSINV(RAND()) O = NORMINV(RAND(), 5 * 35, 5) O = 5* NORMINV(RAND(), 35, 5)
Solve for the:1. Mean2. Median3. Mode 4. Standard Deviation
A state wildlife service wants to estimate the mean number of days that each licensed hunter actually hunts during a given season, with a bound on the error of estimation equal to 2 hunting days. If data collected in earlier surveys have shown σ to be approximately equal to 10, how many hunters must be included in the survey?
During the 2003 season, Major League Baseball took steps to speed up the play of baseball games in order to maintain fan interest (CNN Headline News, September 30, 2003). The following results come from a sample of 60 games played during the summer of 2002 and a sample of 50 games played during the summer of 2003. The sample mean shows the mean duration of the games included in each sample. 2002 Season 2003 Season n1 = 60 n2 = 50 x1 = 2 hours, 52 minutes x2 = 2 hours, 46 minutes Provide a 95% confidence interval estimate of the reduction in the mean duration of games during the 2003 season.
A state wildlife service wants to estimate the mean number of days that each licensed hunter actually hunts during a given season, with a bound on the error of estimation equal to 3 hunting days. If data collected in earlier surveys have shown a to be approximately equal to 12, how many hunters must be included in the survey?
Help me answer questions in picture with the following information below: REM (rapid eye movement) sleep is sleep during which most dreams occur. Each night a person has both REM and non-REM sleep. However, it is thought that children have more REM sleep than adults†. Assume that REM sleep time is normally distributed for both children and adults. A random sample of n1 = 9 children (9 years old) showed that they had an average REM sleep time of x1 = 2.9 hours per night. From previous studies, it is known that ?1 = 0.7 hour. Another random sample of n2 = 9 adults showed that they had an average REM sleep time of x2 = 2.00 hours per night. Previous studies show that ?2 = 0.9 hour. Do these data indicate that, on average, children tend to have more REM sleep than adults? Use a 1% level of significance.
A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per sales person. The following table gives the monthly distances in miles driven by a random sample of 15 sales persons: 2560, 2506, 2437, 2476, 2128, 2537, 2023, 2664, 2555, 2552, 2626, 1900, 2691, 1907, 2542 Based on this sample, find a 90% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the confidence Aa interval? What is the upper limit of the confidence interval?
The researcher took a random sample of 50 residents and found that the mean height of men is 175cm. Suppose that the team is made aware of the fact that the distribution of heights is distributed normally. 1, The sample median is an unbiased estimate of the mean height of men. Is the following statement about the estimator true? 2, Determine whether or not the median or mean is an efficient estimator of the population median.

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