The weight percent of silicon in six different rock samples, each containing different amounts of silicon, was measured by twodifferent methods. The results are given in the table.Sample Method A Si wt% Method B Si wt%111.57011.500215.38015.300317.95017.830422.84022.810525.11025.150627.07027.040Determine tcalc.tcalc =Determine ttable at the 95% confidence level. A list of t values can be found in the Student's t table.ttable =

The question is about paired t test.Given :No. of rock samples ( n ) = 6

Answered: The weight percent of silicon in six…

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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Two types of instruments for measuring the amount of sulfur monoxide in the atmosphere are compared in an air- pollution experiment. It is desired to determine whetherthe two types of instrument yield the equalmean measurement. The following readings were recorded forthe two instruments: Sulfur Monoxide InstrumentA 0.96 Instrument B 0.87 0.74 0.82 0.75 0.61 0.89 0.64 0.81 0.68 0.65 0.63 0.55 0.75 0.70 0.69 0.57 0.53 a) Construct 90% confidence intervalfor the ratio of standard deviations of measurements of the two instruments. b) Depending upon the answerto part (a), construct 95% confidence interval for the difference between the mean measurements of the two instruments and interpret your answer. Assume the measurements are approximately normally distributed. c) Do the mean measurements of the two instruments differ?
The type of household for the U.S. population and for a random sample of 411 households from a community in Montana are shown below. Type of Household Percent of U.S.Households Observed Numberof Households inthe Community Married with children 26% 100 Married, no children 29% 121 Single parent 9% 31 One person 25% 94 Other (e.g., roommates, siblings) 11% 65 Find the value of the chi-square statistic for the sample. (Round the expected frequencies to two decimal places. Round the test statistic to three decimal places.)
The percentage crude protein content of hay was determined based on 10 bale samples collected from each of four locations (plots as treatments) on a large ranch as follows: Plot A 12.8 13.4 11.2 11.6 9.4 10.3 14.1 11.9 10.5 10.4 C. Plot B 8.1 10.3 4.2 7.8 5.6 8.1 12.7 6.8 6.9 6.4 Plot C 9.8 10.6 9.1 4.3 11.2 11.6 8.3 8.9 9.2 6.4 Plot D 16.4 8.2 15.1 10.4 7.8 9.2 12.6 11.0 8.0 9.8 Set up and complete an ANOVA table for a completely randomized block design. Show all work.
In evaluating a forge crop, it is important to measure the concentration of various constituents in the plant tissue. In a study of reliability of such measurements, a batch of alfalfa was dried, ground, and passed through a fine screen. Five small (0.3 gm) aliquots of alfalfa were then analyzed for their content of insoluble ash. The results (gm/kg) were as follows: 10.0 8.9 9.1 11.7 7.9 For these data, calculate the mean, the standard deviation, and the standard error of mean.
c?
The table (attached image) gives measurements of length and weight for a sample of 20 low birth weight infants. 1. Describe in simple, concise, and short words what you see in the histogram of the weight measurements (attached image)
Sand and clay studies were conducted at the West Side Field Station of the University of California. (Reference: Professor D. R. Nielsen, University of California, Davis.) Twelve consecutive depths, each about 15 cm deep, were studied and the following percentages of sand in the soil were recorded. 19.5 27.3 30.4 24.2 33.8 27.4 24.8 18.2 16.4 8.4 1.7 0.1 Test the sequence for randomness about the median. Use α = 0.05. (a) What is the level of significance? (b) Find the sample test statistic R, the number of runs.(c) Find the upper and lower critical values in Table 10 of Appendix II. c1 c2
Listed below are the measured radiation absorption rates (in W/kg) corresponding to 11 cell phones. Use the given data to construct identify the 5-number summary.
Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration in bottom water and surface water. Bottom 0.430 0.266 0.567 0.531 0.707 0.716 0.651 0.589 0.469 0.723 Surface 0.415 0.238 0.390 0.410 0.605 0.609 0.632 0.523 0.411 0.612 With the help of Mathematics and R Studio: Does the data suggest that the true average concentration in the bottom water is different than that of surface water? You can assume that the conditions for inference are met.
A sample of blood pressure measurements is taken for a group of adults, and those values (mm Hg) are listed below. The values are matched so that 10 subjects each have a systolic and diastolic measurement. Find the coefficient of variation for each of the two samples; then compare the variation. Systolic Diastolic116 78129 75160 7596 53157 90124 86114 60136 66128 74121 83
The percentage crude protein content of hay was determined based on 10 bale samples collected from each of four locations (plots as treatments) on a large ranch as follows: Plot A 12.8 13.4 11.2 11.6 9.4 10.3 14.1 11.9 10.5 10.4 b. Plot B 8.1 10.3 4.2 7.8 5.6 8.1 12.7 6.8 6.9 6.4 Plot C 9.8 10.6 9.1 4.3 11.2 11.6 8.3 8.9 9.2 6.4 Plot D 16.4 8.2 15.1 10.4 7.8 9.2 12.6 11.0 8.0 9.8 Set up and complete an ANOVA table for a one-way analysis. Show all work.

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