A7. The analyst in the Dorben Company made 10 independent time studies in the hand paint-spraying section of the finishing department. The product line under study revealed a directrelation between spraying time and product surface area. The following data were collected.Study No.1234568910Surface Area17012150411305070 10595(sq. inches)StandardTime (hours)0.32 0.11 0.31 0.140.270.1871200.240.23 0.25(7a) Compute the slope and intercept constant using regression line equations.(7b) What is the correlation coefficient?(7c) How much spray time would you allow for a new part with a surface area of 250 sq.inches?0.22

The question is about regression Given : To find : a ) Slope and intercept b ) Correl.…

Answered: 7. The analyst in the Dorben Company…

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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Suppose u, and u, are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. The data follows: m = 5, x = 115.1, s, = 5.05, n = 5, y = 129.2, and s, = 5.36. Calculate a 95% CI for the difference between true average stopping distances for cars equipped with system 1 and cars equipped with system 2. (Round your answers to two decimal places.) n USE SALT Does the interval suggest that precise information about the value of this difference is available? O Because the interval is so narrow, it appears that precise information is available. o Because the interval is so wide, it appears that precise information is not available. o Because the interval is so narrow, it appears that precise information is not available. Because the interval is so wide, it appears that precise information is available. You may need to use the appropriate table in the Appendix of Tables to answer this question.
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. The raw data provided in table below. Does the data suggest that the true average concentration in the bottom water exceeds that of surface water? Use ?=0.01.
Please answer the following including the conditions that need to be met and how to compute the answer using a graphing calculator. Thank you.
5. Oxygen demand is a term blologists use to describe the axygen needed by fish and other aquatic organisms for survval. The Environmental Protection Agency conducted a study of a wetland area in Marin County, Californla. In this wetland environment, the mean oxygen demand was u=9.9 mg/L, and a= 1.7 mg/L. (Reference: EPA Report 832-R- 93- 005). Let x be a random varlable that represents oxygen demand in this wetland environment. Assume x has a probability distribution that is approximately normal. a. An oxygen demand below 8 mg/L Indicates that some organisms In the wetland environment may be dying. What is the probability that the oxygen demand will fall below 8 mg/L? b. A high oxygen demand can also indicate trouble. An oxygen demand above 12 mg/L may indicate an overabundance of organisms that endanger some types of plant life. What is the probability that the oxygen demand will exceed 12 mg/L?
Assignment: Analyze Filling Line Problems Using Control Charting Attached Files: File Filling line example for X-bar & control chart.xlsxOpen this document with ReadSpeaker docReader (13.354 KB) Using the provided data, calculate the control limits (X-bar and r-chart, Capability Index, create a control chart, and calculate the percentage of units that are expected to be out of spec (z-value). Show your work A quick way to do the percents part of the filling line problem (you know, the percent underfilled, the percent overfilled, etc.), is to use Excel's norm.dist function rather than looking it up on a printed Z table. Use the norm.dist excel function with the LSL in the first position in the parameter list. Norm.dist gives you the left side return from the Z table. "Excel offers you the NORM.DIST statistical function for working with normal distributions. The NORM.DIST function calculates the probability that variable X falls below or at a specified value"…
1. The following data was used to determine the concentration of arsenic in a river using atomic absorption spectrometry. Three replicate measurements were recorded for each sample and the absorbance values below are the averages. Conc. As (ppb) Abs. 2.5 0.0297 5.0 0.0588 7.5 0.0782 10.0 0.1039 Unknown 0.0615 a. Graph the data and determine the slope and and intercept. Use Excel-possibly the LINEST function- to determine the standard error about the regression. This is the uncertainty in the absorbance. b. C. d. e. Calculate the concentration of the arsenic in ppb. Do not worry about rounding to the correct number of significant figures until part e of this question. Determine the absolute uncertainty (i.e., standard devation) of the arsenic concentration for the unknown. Write the As concentration and its standard deviation to the correct number of significant figures.

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