Errors in chemical analysisThe concentration of nitrate in a standard sample were measured by lab-1 and the results of thereplicates are shown below. Knowing that the true value is 3.40 ppmLab-1: 3.23, 3.21, 3.29, 3.25 ppma. Complete the table.MeanStandarddeviationCoefficient ofvariationMedianspreadPercentrelative errorb. Another lab (Lab-2) did the same measurements on the same sample with an average of3.44 and standard deviation of 0.075. Which laboratory gave results that:were more accurate?Justifywere more precise?Justify

Name: Errors in chemical analysisThe concentration of nitrate in a standard
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Errors in chemical analysisThe concentration of nitrate in a standard sample were measured by lab-1 and the results of thereplicates are shown below. Knowing that the true value is 3.40 ppmLab-1: 3.23, 3.21, 3.29, 3.25 ppma. Complete the table.MeanS

Math

Statistics

Errors in chemical analysis The concentration of nitrate in a standard sample were measured by lab-1 and the results of the replicates are shown below. Knowing that the true value is 3.40 ppm Lab-1: 3.23, 3.21, 3.29, 3.25 ppm a. Complete the table. Mean Standard Median spread Coefficient of Percent deviation variation relative error b. Another lab (Lab-2) did the same measurements on the same sample with an average of 3.44 and standard deviation of 0.075. Which laboratory gave results that: were more accurate? Justify were more precise? Justify

Errors in chemical analysis The concentration of nitrate in a standard sample were measured by lab-1 and the results of the replicates are shown below. Knowing that the true value is 3.40 ppm Lab-1: 3.23, 3.21, 3.29, 3.25 ppm a. Complete the table. Mean Standard Median spread Coefficient of Percent deviation variation relative error b. Another lab (Lab-2) did the same measurements on the same sample with an average of 3.44 and standard deviation of 0.075. Which laboratory gave results that: were more accurate? Justify were more precise? Justify

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

If we want to compare average charges for males and females, we would use O two sample z- test O single sample t-test O Correlation OTwo sample t-test
neat and clean answer pleasev
IQ scores for three different blood lead levels was measured. If we use three categories of blood lead levels with measured verbal IQ scores, we get the computer output which is summarized in table form. Using a 0.05 significance test, test the claim that the three categories of blood lead level have the same mean verbal IQ score. Does exposure to lead appear to have an effect on verbal IQ scores? Interpret the table below. Source of variation df Sum of squares Mean squares Computed f p-value LEAD 2 142 71 0.39 0.677 Error 118 21441 182 Total 120 21584
pare percentage differences between 2 or more categories of an independent variable), the following statistical test should be used: a. Simple linear regression b. Pearson correlation coefficient c. T test d. Chi-square test
To determine if their 1.50 centimeter bolts are properly adjusted, Norman & Mayer Manufacturing has decided to use an X-Chart which uses the range to estimate the variability in the sample. Table Control Chart Answer How to enter your answer (opens in r Step 1 of 7: What is the Center Line of the control chart? Round your answer to three decimal places. Period 1 2 3 4 5 6 Copy Table Tables Select the Copy Table button to copy all values. To select an entire row or column, either click on the row or column header or use the Shift and arrow keys. To find the average of the selected cells, select the Average Values button. ON obs1 obs2 1.45 1.52 1.55 1.51 1.51 1.50 1.50 1.53 1.46 1.53 1.52 1.54 1.51 1.50 1.50 1.52 1.46 1.47 1.52 1.53 1.53 1.54 1.53 1.53 1.53 1.53 1.54 1.48 1.54 1.49 1.53 1.50 7 1.46 1.46 1.54 1.48 1.49 1.51 8 1.47 1.48 1.51 1.51 1.53 1.50 9 1.50 1.54 1.54 1.53 1.53 1.49 10 1.54 1.49 1.55 1.51 1.51 1.50 Keypad Copy Table Average Values The average of the selected cell(s)…
The __________ __ __ ______ of a random sample is the graph of its theoretical normal percentiles paired with corresponding actual percentiles of the random sample. A. scatterplot B. normal q-q plot C. fitted histogram D. unbiased estimator
Multiple choice question Select the best suitable answer. If none of the choices represents a correct answer, select “Other” and write your own answer. Please, I need your help.
Why the correct answer is D? The distribution of the time it takes for different people to solve a certain crossword puzzle is skewed to the right,with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times is(a) Normally distributed, with mean 30 and standard deviation 15.(b) skewed to the right, with mean 30 and standard deviation 15.(c) Normally distributed, with mean 0 and standard deviation 1.(d) skewed to the right, with mean 0 and standard deviation 1.(e) skewed to the right, but the mean and standard deviation cannot be determined without more information.
Can someone please help me with this question?
_________ are used to display actual data points for individual-level data. Would this answer be Univariate Statistics?
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
HypertensionA hypertensive patient has been on antihypertensive medication for several years. Her physician wants to monitor herblood pressure via weekly measurements taken at home.Each week for 6 weeks she takes several blood pressurereadings and averages the readings to get a summary bloodpressure for the week. The diastolic blood pressure (DBP)results are shown in Table 6.15.Table 6.15 Weekly mean DBP readingsfor an individual patientWeek Mean DBP Mean DBP (mm Hg) Week (mm Hg)1 89 4 842 88 5 823 81 6 89.5Mean 85.75sd 3.66 6.106 What is the probability that the sample mean will bewithin 1 unit of the population mean?6.107 Suppose we want to choose a large enough sampleso that the sample mean is within 1 unit of the populationmean 99% of the time. What is the minimum sample size toachieve this goal? Suppose the incidence rate of myocardial infarction (MI)was 5 per 1000 among 45- to 54-year-old men in 2000.To look at changes in incidence over time, 5000 men in thisage group were…