An analyst wants to compare the analytical performances of a new method in the determination of Se in vegetables with a reference method. The analyst selects a suitable sample and analyses 8 portions of the sample using the reference method and 8 portions using the proposed method. The results are shown Method Reference Mean (mg/100g) Standard deviation (mg/100g) 0.1988 0.0275 Proposed 0.1513 0.0210 Check whether the measurement results are compatible at 0.05 significance level. Given that F. = 4.99 and tc = 2.145.

An analyst wants to compare the analytical performances of a new method in the determination of Se in vegetables with a reference method. The analyst selects a suitable sample and analyses 8 portions of the sample using the reference method and 8 portions using the proposed method. The results are shown Method Reference Mean (mg/100g) Standard deviation (mg/100g) 0.1988 0.0275 Proposed 0.1513 0.0210 Check whether the measurement results are compatible at 0.05 significance level. Given that F. = 4.99 and tc = 2.145.

Name: 3. An analyst wants to compare the analytical performances of a new m
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 3. An analyst wants to compare the analytical performances of a new methodin the determination of Se in vegetables with a reference method. Theanalyst selects a suitable sample and analyses 8 portions of the sampleusing the reference method and 8 po

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

a) Soil has been improved to increase the strength of a ground. The average compressive strength of 61 samples before treatment is 45 kg / cm2 and the standard deviation is 6.75 kg / cm2; The average compressive strength of 56 samples after the improvement is 52.5 kg / cm2 and the standard deviation is 8 kg / cm2. Determine whether the improvement application changes the standard deviation of the soil strength or not at the 5% significance level .b) Find the confidence intervals at the 7% significance level of the mean compressive strength of the sample after improvement?
To build a 86% CI for the mean of a population, you take a random sample of 31 values and find s = 18. What is the Margin of Error, E? Round the Critical Value and your answer to three decimals. Submit Question tor
The following sample data are from a normal population: Sample size (n) = 25, Sample mean=14, Sample standard deviation=3.6 With 95% confidence, what is the margin of error for the estimation of the population mean?
Weights of whole walnuts are normally distributed with mean 9.2 grams and standard deviation 0.104 grams. What proportion of walnuts weigh less than 8.9722 grams? What proportion of walnuts weigh more than 9.0315 grams? Use the closest value in the normal table, and show all four decimals.
Present the results using APA format. What does the conclusions mean in general terms?
What are the limitations of a population range of 25, a population variance of 72.9167, and a population standard deviation of 8.5391?
Big babies: The National Health Statistics Reports described a study in which a sample of 96 one-year-old baby boys were weighed. Their mean weight was 25.6 pounds with standard deviation 5.3 pounds. A pediatrician claims that the mean weight of one-year-old boys is greater than 25 pounds. Do the data provide convincing evidence that the pediatrician's claim is true? Use the =α0.05 level of significance and the P -value method and Excel. Part: 0 / 5 0 of 5 Parts Complete Part 1 of 5 (a)State the appropriate null and alternate hypotheses. H0 : =μ25 H1 : >μ25 This hypothesis test is a ▼two-tailed test. Part: 1 / 5 1 of 5 Parts Complete Part 2 of 5 (b)Compute the value of the test statistic. Round the answer to at least three decimal places.…
In 2009 Noodles & Company introduced spaghetti and meatballs to its menu. Before putting it on the menu, it performed taste tests to determine the best-tasting spaghetti sauce. In a paired comparison, 35 tasters were asked to rate their satisfaction with two different sauces on a scale of 1 to 10, with 10 being the highest. Assume equal population variances. The mean difference in ratings was d¯d¯ = -0.25944 with a standard deviation of sd = 1.53990. Use α = 0.05. b) Find the test statistic tcalc. (Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.) (c) Find the critical value tcrit for α = .05. (Round your answer to 3 decimal places.) (d) Find the p-value. (Round your answer to 3 decimal places.)
Suppose the mean weight of King Penguins found in an Antarctic colony last year was 15.4 kg. In a sample of 35 penguins same time this year in the same colony, the mean penguin weight is 14.6 kg. Assume the population standard deviation is 2.5 kg. At .05 significance level, can we reject the null hypothesis that the mean penguin weight does not differ from last year? Use P-value approach.
The GRE General Test, a standardized exam required by many graduate schools for applying to their graduate programs, was recently revised. On a scale of 130 to 170, the mean for the verbal GRE test was 145 in sample of 50 JMU students. The population mean was 140 and standard deviation was 4. Using these data, test whether or not there exists a sig diff between population mean and sample mean
Using the R studio dataset: tsa <- read.csv("https://remiller1450.github.io/data/tsa.csv") From this dataset, take a sample of n = 10 claims. Record the mean Close Amount of this sample. Repeat this 500 times using a for-loop. What is the mean and the standard deviation of these 500 sample means. Draw a histogram (use freq = FALSE option) of these 500 sample means.
A market research group would like to know the satisfaction of subscribers in terms of the quality of service provided by Smart Communications and Globe Telecom. Using a survey, they gathered data from two independent samples. The data below summarizes the average customer satisfaction score (out of 10) towards the quality of services of their mobile providers. The satisfaction score is assumed to be normally distributed with unknown and UNEQUAL population variances. Statistics Smart Communications Globe Telecom Mean 4.20 3.15 Standard Deviation 1.25 2.25 Sample Size 25 20 a) Is there a difference in the average satisfaction scores of subscribers from Smart Communications and Globe Telecom? Make the comparisons at the 10% and 5% levels of significance. b) On average, are subscribers from Smart Communications more satisfied with their service provider than from the subscribers from Globe Telecom? Use the 5% and 1% levels of significance.