Two neurologists examined 55 magnetic resonanceimagings (MRIs) for evidence of brain tumors. As shown inthe table below, the neurologists read each MRIS as eitherpositive or negative for brain tumors.NEUROLOGIST 1TOTALPOSITIVENEUROLOGISTPOSITIVE20262NEGATIVE29TOTAL3455Compute for the Kappa test ratio.NEGATIVE61521

Given Information: No. of observations=55both MRI's are postive=20both MRI's are negative=15First is…

Answered: Two neurologists examined 55 magnetic…

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 Hill of Tara is located in south-central Meath, not far from Dublin, Ireland. Tara is of great cultural and archaeological importance, since it is by legend the seat of the ancient high kings of Ireland. For more information, see Tara: An Archaeological Survey, by Conor Newman, Royal Irish Academy, Dublin. Magnetic surveying is one technique used by archaeologists to determine anomalies arising from variations in magnetic susceptibility. Unusual changes in magnetic susceptibility might (or might not) indicate an important archaeological discovery. Let x be a random variable that represents a magnetic susceptibility (MS) reading for a randomly chosen site on the Hill of Tara. A random sample of 120 sites gave the readings shown in the table below. Magnetic Susceptibility Readings, centimeter-gram-second x 10-6 Magnetic Susceptibility 0 < x < 10 10 < x < 20 20 < x < 30 (cmg x 10-6) Number of Estimated Comment Readings 30 Probability 0.25 "cool" 30/120 54/120 = 0.45 18/120 = 0.15 =…
Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2507 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 73% of households saw the ad. An analysis indicates that an ad has to be viewed by 72% or more households to be cost effective. Based on this test, should the local sponsor run this ad?
Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2501 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 11% of households saw the ad. An analysis indicates that an ad has to be viewed by 10% or more households to be cost effective. Based on this test, should the local sponsor run this ad? Digital video recorders allow us to skip commercials when watching TV. Some allow advertisers to see which ads are watched. A study used this technology in a sample of 2501 homes in a city. XYZ monitored viewer’s reactions to ABC product ad that featured the band Roq. The ad won critical acclaim, but XYZ found that only 11% of…
An interdepartmental task force is being formed to investigate an increase in violent crimes. 1/5 of the task force will be police officers from the local precinct. 1/4 will be ATF agents, and the remaining 22 will be from the FBI. How many people are participating in the task force?
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Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 38 waves showed an average wave height of x = 17.3 feet. Previous studies of severe storms indicate that ? = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. a) Estimate the P-value. choose one: P-value > 0.2500. 100 < P-value < 0.250 0.050 < P-value < 0.1000. 010 < P-value < 0.050 P-value < 0.010 b) Sketch the sampling distribution and show the area corresponding to the P-value.…
A hospital report indicates 25% of its patients had an MRI in January. If 1,060 patients were hospitalized in January, how many had an MRI?
Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 32 waves showed an average wave height of x = 16.9 feet. Previous studies of severe storms indicate that ? = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. H0: ? = 16.4 ft; H1: ? < 16.4 ftH0: ? > 16.4 ft; H1: ? = 16.4 ft H0: ? < 16.4 ft; H1: ? = 16.4 ftH0: ? = 16.4 ft; H1: ? > 16.4 ftH0: ? = 16.4 ft; H1: ? ≠ 16.4 ft…

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Two neurologists examined 55 magnetic resonance imagings (MRIs) for evidence of brain tumors. As shown in the table below, the neurologists read each MRIs as either positive or negative for brain tumors. NEUROLOGIST 1 TOTAL POSITIVE NEGATIVE