The rare earth element gadolinium is often used as a contrasting agent for MRIS. The concentration of gadolinium was measuredin the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.254 ppm,1.252 ppm, 1.246 ppm, 1.242 ppm, 1.815 ppm, 1.244 ppm, 1.251 ppm, 1.249 ppm.Use the Grubbs test to determine if one of these values is an outlier. What is the value of Geale?Should this potential outlier be rejected with 95%Gcalc =confidence? Critical values of G can be found inthis table.+ TOOLSx10The potential outlier should be rejected.The potential outlier should be kept.Based on the outcome of the Grubbs test, calculate the mean (x), standard deviation (s), and 99% confidence interval forthe results. A list of t values can be found in the Student'st table.ppmS =Ppmconfidence interval:ppm

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Answered: The rare earth element gadolinium is…

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 following data refers to yield of tomatoes (kg/plot) for four different levels of salinity. Salinity level here refers to electrical conductivity (EC), where the chosen levels were EC = 1.6, 3.8, 6.0, and 10.2 nmhos/cm. (Use i = 1, 2, 3, and 4 respectively.) 1.6: 59.9 53.5 56.7 63.2 58.6 3.8: 55.6 59.6 52.6 54.5 6.0: 51.2 48.6 53.8 48.9 10.2: 44.3 48.4 41.0 47.9 46.5 In USE SALT Use the F test at level a = 0.05 to test for any differences in true average yield due to the different salinity levels. State the appropriate hypotheses. O Ho: H1 = H2 = !3 = H4 H: all four u's are unequal O Ho: H1 = H2 = H3 = H4 H: at least two u's are unequal O Ho: H1 # Hq # Hz# H4 H: all four u's are equal O Ho: H1* H2 * H3# H4 H: at least two u's are equal Calculate the test statistic. (Round your answer to two decimal places.) f = What can be said about the P-value for the test? O P-value > 0.100 O 0.050 < p-value < 0.100 O 0.010 < p-value < 0.050 O 0.001 < P-value < 0.010 O P-value < 0.001
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A. A patient was given a z score of 2.1 for their bone density exam. The μ = 75 and σ = 8. What is their score (X) for the exam? B. A patient was given an exam score of X = 77. The μ = 75 and σ = 8. What is their z score for the exam?
You investigate the relationship between height and dbh (diameter at breast height) of oak trees. You get the following results: dbh (cm): 26 49 52 32 15 15 39 41 20 30 46 42 21 40 17 38 13 26 49 26height(m): 10.2 13.5 16.3 10.8 8.9 10.0 14.2 11.3 9.7 11.4 13.5 13.6 11.6 11.2 7.7 13.1 7.9 10.4 15.6 9.0 Read the data into R. (a) Calculate the following using R: ̄x , ̄y , SSx, SSy. (Note that to get SSy or SSx, you can just ask R for the variance (var) or standard deviation, and then do the appropriate calculation).(b) Perform a complete test of the hypothesis that there is no difference in height as dbh increases. Write out all the appropriate steps of a regular hypothesis test (give H0, H1, α, your decision, etc.)(c) Give the equation of the least squares line
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