A chemist wishes to test the effect of four chemical agents on the strength of a particular typeof cloth. Because there might be variability from one bolt to another, the chemist decides touse a randomized block design, with the bolts of cloth considered as blocks. She selects fivebolts and applies all four chemicals in random order to each bolt. The resulting tensile strengthsfollow. (one-way ANOVA)BoltChemical 1234515045514844250445249473524555504545048525246(a) Analyze the data from this experiment (use α = 0.05) and draw appropriate conclusions.(b) Use the Tukey's test with α = 0.05 to make comparisons between pairs of means.(c) Use the Fisher LSD method with α = 0.05 to make comparisons between pairs of means.

The objective of the question is to analyze the effect of different chemical agents on the strength…

Answered: A chemist wishes to test the effect of…

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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Three fertilizers are studied for their effect on yield in an orange grove. Nine plots of land are used, divided into blocks of three plots each. A randomized complete block design is used, with each fertilizer applied once in each block. The results, in pounds of harvested fruit, are presented below. The data can also be downloaded here Fertilizer.csv Download. Fertilizer Plot 1 Plot 2 Plot 3 A 327 456 273 B 401 546 320 C 304 440 235 Test Fertilizer Effect, can we conclude that the mean yields differ among the fertilizers? Answer Yes or No. .What is the value of the F statistic for this test? .What is the p-value of the test? .
The average worker at a local brake manufacturer produces 10 brakes per day (other statistical information was not known). An industrial psychologist was hired to increase worker productivity and a new assembly method was designed and tested in a sample of workers. Identify the appropriate test. Select one: a. independent samples t test b. z test c. single sample t test d. paired samples t test
How is the hatching of water python eggs influenced by the temperature of the snake's nest? Researchers randomly assigned newly laid eggs to one of three water temperatures: hot, neutral, or cold. Hot duplicates the extra warmth provided by the mother python, and cold duplicates the absence of the mother. The table shows the result of the experiment. The researchers will use a chi-square test for homogeneity to analyze the findings. Hatching status Yes No Total Cold 16 11 27 Water Temperature Neutral Hot 38 75 18 56 104 Total 129 58 187 Which of the following is false? All of the conditions are met for conducting a chi- square test for homogeneity. The data came from 3 groups in a randomized experiment. All expected counts are at least 5. The 10% condition is met. The 10% condition is not needed because the eggs were not randomly selected from the population. Incorrect
part F G
Have you ever been frustrated because you could not get a container of some sort to release the last bit of its contents? An article reported on an investigation of this issue for various consumer products. Suppose five 6.0 oz tubes of toothpaste of a particular brand are randomly selected and squeezed until no more toothpaste will come out. Then each tube is cut open and the amount remaining is weighed, resulting in the following data: 0.51, 0.63, 0.42, 0.5, 0.35. Does it appear that the true average amount left is less than 10% of the advertised net contents? USE SALT (a) Check the validity of any assumptions necessary for testing the appropriate hypotheses. O The sample was randomly selected and the normal probability plot is not acceptably nonlinear. The sample was selected to represent a range of results and the normal probability plot is not acceptably nonlinear. The sample was selected to represent a range of results and the normal probability plot is not acceptably linear. O…
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Two major automobile manufacturers have produced compact cars with engines of the same size. We are interested in determining whether or not there is a significant difference in the mean MPG (miles per gallon) when testing for the fuel efficiency of these two brands of automobiles. A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance. The following data (in miles per gallon) show the results of the test. Assume the population of differences is normally distributed. Driver Manufacturer A Manufacturer B 1 36 30 2 31 31 3 30 28 4 30 27 5 29 27 6 33 30 7 35 25 8 29 31 The test statistic is 2.316. At ? = 0.10, the null hypothesis should be revised .should not be tested. should be rejected. should not be rejected.
John is skeptical of his friend's claim that Gerald's coffee house has much stronger coffee (in terms of caffeine content) than Sabine's Beans does. So John takes a random sample of large coffees from both shops. and measure the amount of caffeine content in each coffee. Here is a summary of the results: Gerald's Coffee HouseSabine's BeansMean193.06 mG155.97 mGSt. Dev.6.47 mG8.58 mGNumber of Cups6572 John wants to test the null hypothesis H0 : µ1 ≥ µ2 against the alternative hypothesis Ha : µ1 < µ2 at 95% confidence level. What is the critical value to accept/reject the null hypothesis against the alternative hypothesis?
Is the following a null or an alternative hypothesis? Iced coffee tastes better than hot coffee.

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