A laboratory in Oregon is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 60mEqhealthy residents has a mean chloride level of 103If it is known that the chloride levels in healthy individuals residing inmEqfind a 95% confidence interval for the true mean chloride level of all healthy OregonOregon have a standard deviation of 42Lresidents. Then give its lower limit and upper limit.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary,consult a list of formulas.)Lower?.limit:Upperlimit:

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Answered: A laboratory in Oregon is interested in…

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 brain volumes (cm) of 50 brains vary from a low of 906 cm" to a high of 1488 cm. Use the range rule of thumb to estimate the standard deviation s and compare 3 13 the result to the exact standard deviation of 171.4 cm", assuming the estimate is accurate if it is within 15 cm 3 The estimated standard deviation is cm. (Type an integer or a decimal Do not round.) Compare the result to the exxact standard deviation. A. * The approximation is not accurate because the error of the range rule of thumb's approximation is less than 15 cm 13 The approximation is accurate because the error of the range rule of thumb's approximation is less than 15 cm cm³ OC. 3. The approximation is not accurate because the error of the range rule of thumb's approximation is greater than 15 cm 3 9 . The approximation is accurate because the error of the range rule of thumb's approximation is greater than 15 cm". cm³ in el Cick to select your answer(s). er javascript:doBxercise(3)- selected from a set of...…
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores. (a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep? answer: (c) Fourty percent of students get less than how many hours of sleep on a typical day? answer: hours problem
Currently patrons at the library speak at an average of 61 decibels. Will this average increase after the installation of a new computer plug in station? After the plug in station was built, the librarian randomly recorded 48 people speaking at the library. Their average decibel level was 66.5 and their standard deviation was 20. What can be concluded at the the α= 0.10 level of significance? a. The test statistic = (please show your answer to 3 decimal places.) b. The p-value = (Please show your answer to 4 decimal places.)
In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 99% confident that your sample mean is within 20 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 129 min. show formulas and draw all curves.
You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of ¯x=76x¯=76 hours. The population standard deviation is known to be 5.6 hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.4 hours at a 90% level of confidence. How many more bacteria should you sample to achieve a 0.4 hour margin of error? n = bacteria
Suppose that the hemoglobin levels among healthy females are normally distributed with a mean of 14.1 gdL. Research shows that exactly 95% of healthy females have a hemogoblin level of 16.1 gdL. What is the standard deviation of the distribution of hemoglobin levels and healthy females. Carry you intermediate computations to atleast four decimal places, and round your answer to at least two decimal places.
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 43 feet. Assume the population standard deviation is 4.6 feet. The mean braking distance for Make B is 46 feet. Assume the population standard deviation is 4.5 feet. At α=0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. The critical value(s) is/are Find the standardized test statistic z for μ1−μ2.
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 41 feet. Assume the population standard deviation is 4.6 feet.The mean braking distance for Make B is 42 feet. Assume the population standard deviation is 4.4 feet. At α=0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha. What is the claim? A.The mean braking distance is different for the two makes of automobiles. This is the correct answer. B.The mean braking distance is the same for the two makes of automobiles. C.The mean braking distance is less for Make A automobiles than Make B automobiles. Your answer is…
The average zinc concentration recovered from a sample of measurements taken in 40 different locations in a river is found to be 2.5 grams per milliliter. How large a sample is required if we want to be 95% confident that our estimate of ? is off by less than 0.05. Assume that the population standard deviation is 0.25 gram per milliliter.
A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of 90 people shows that the mean tuna consumption by a person is 3.4 pounds per year. Assume the population standard deviation is 1.11 pounds. At α=0.06, can you reject the claim?
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