Storage of Soil Samples. The concentration of benzene (ug/g) in soil was measured afterbeing stored in sealed glass ampules for different times, as shown in the data below. Quantitiesgiven are average ± standard deviation, based on n = 3. Do the results indicate that storagetime must be limited to avoid biodegradation?Day 06.1 ± 0.7Day 55.9±0.2Day 116.2±0.2Day 205.7±0.2

Given data: Sample size Sample mean Sample standard deviation Day 0 3 6.1 0.7 Day 5 3 5.9…

Answered: Storage of Soil Samples. The…

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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v Question Completion Status: d. 0.3085 QUESTION 2 EPA fuel economy estimates for automobile models tested recently predicts a mean of 24 and a standard deviation of 6 mpg. Assume that a Normal model applies, N(24, 6). mpg What proportion of automobiles would expect to have gas mileage rates between 10 and 16 mpg? O a. 0.1587 O b. 0.0819 C. 0.0099 O d. 0.0918 QUESTION 3
Which of the following statement is FALSE about X? ANOVA Source of variation df MS F stat P-value F crit Between Groups 5.2 a 2.6 Y 0.4177 3.8853 33.2 2.7667 Total 38.4 A. Within group variation В. Error C. Measure the variability between all group's mean and the grand mean. D. Measure the variability of the observed value around their respective group mean. А C D Answer
5.58 The concentration of mercury in a lake has been monitored for a number of years. Measurements taken on a weekly basis yielded an average of 1.20 mg/m (milligrams per cubic meter) with a standard deviation of .32 mg/m. Following an accident at a smelter on the shore of the lake, 15 measurements produced the following mercury concentrations. 1.60 1.77 1.61 1.08 1.07 1.79 1.34 1.07 1.45 1.59 1.43 2.07 1.16 0.85 2.11 ES ABOUT POPULATION CENTRAL VALUES a. Give a point estimate of the mean mercury concentration after the accident. b. Construct a 95% confidence interval on the mean mereury concentration after the accident. Interpret this interval. c. Is there sufficient evidence that the mean mercury concentration has increased since the accident? Use a = .05. d. Assuming that the standard deviation of the mercury concentration is .32 mg/m. calculate the power of the test to detect mercury concentrations of 1.28, 1.32. 1.36, and 1.40.
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Trap spacing measurements (in meters) for a sample of seven teams of red spiny lobster fisherman are reproduced in the accompanying table. Let u represent the average of the trap spacing measurements for the population of red spiny lobster fisherman. The mean and the standard deviation of the sample measurements are x = 91.4 meters and s = 12.2 meters, respectively. Suppose you want to determine if the true value of µ differs from 95 meters. Complete parts a through h below. μ 94 100 108 97 83 71 87 a. Specify the null and alternative hypotheses for this test. OA. Ho: μ = 95 Ha: μ 95 d. Find the approximate p-value of the test. OD. Ho: μ = 95 H₂:μ #95 a MacBook Pro Next
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Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
Statistics UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. ANSWER A AND B ONLY
mg and a standard deviation of 0.4 dL mg . Individuals with calcium levels in the bottom dL Calcium levels in people are normally distributed with a mean of 9.4 15% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place. mg dL

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