1. As heat is added to a material its temperature rises. Theheat capacity is a quantitative statement of the increase intemperature for a specified addition of heat. These data areobtained in X, the measured heat capacity of liquidethylene glycol at constant pressure and 80° C.Measurements are in calories per gram degree Celsius:Assume that X is normally distributed. Find a 95%confidence interval for u.

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Answered: 1. As heat is added to a material its…

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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Find the variance of the above random variable random variable
Please help me answer A.
Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. TInterval (13.046,22.15) x= 17,598 Sx = 16.01712719 E Click the icon to view at distribution table. n= 50 a. What is the number of degrees of freedom that should be used for finding the critical value t,,/2? df =D (Type a whole number.) b. Find the critical value t,/2 corresponding to a 95% confidence level. ta/2 =0 (Round to two decimal places as needed.) c. Give a brief general description of the number of degrees of freedom. O A. The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values. O B. The number of degrees of freedom for a collection of sample data is the total number of sample values. O C. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain…
Suppose you computed r = 0.563 using n = 31 data points. Using the critical values table below, determine if the value of r is significant or not. df 1 2 3 4 5 6 7 8 9 10 CV (+ and -) 0.997 0.950 0.878 0.811 0.754 0.707 0.666 0.632 0.602 0.576 Select the correct answer below: df 11 12 13 14 15 16 17 18 19 20 CV (+ and -) 0.555 0.532 0.514 0.497 0.482 0.468 0.456 0.444 0.433 0.423 df 21 22 23 24 25 26 27 28 29 30 CV (+ and -) 0.413 0.404 0.396 0.388 0.381 0.374 0.367 0.361 0.355 0.349 r is significant because it is between the positive and negative critical values. r is not significant because it is between the positive and negative critical values. r is significant because it is not between the positive and negative critical values. r is not significant because it is not between the positive and negative critical values. df 40 50 60 70 80 90 100 CV (+ and -) 0.304 0.273 0.250 0.232 0.217 0.205 0.195
Current Attempt in Progress In the manufacture of electroluminescent lamps, several different layers of ink are deposited onto a plastic substrate. The thickness of these layers is critical if specifications regarding the final color and intensity of light of the lamp are to be met. Let X and Y denote the thickness of two different layers of ink. It is known that X is normally distributed with a mean of 0.1 millimeter and a standard deviation of 0.00031 millimeter, and Y is also normally distributed with a mean of 0.23 millimeter and a standard deviation of 0.00017 millimeter. The value of r for these variables is equal to zero. specifications call for a lamp to have a thickness of the ink corresponding to x in the range of 0.099535 to 0.100465 and Yin the range of 0.22966 to 0.23034 millimeter. What is the probability that a randomly selected lamp will conform to specifications? Round your answer to four decimal places (e.g. 98.7654).
A population of students earned test scores distributed normally with a mean of 65 and a standard deviation of 9. Find the percent of scores with a grade of F. Identify the following variables: μ: σ: x1: x2:z1 = , z2 = The percent of students that earned a grade of F, between 0 and 60, is = % Enter your answers as numbers accurate to 2
Medical Operations The director of a medical hospital feels that her surgeons perform fewer operations per year than the national average of 211. She selected a random sample of 15 surgeons and found that the mean number of operations they performed was 210.6. The standard deviation of the sample was 3.8. Is there enough evidence to support the director's feelings at =α0.10? Assume that the population is approximately normally distributed. Use the critical value method and tables.a. State the hypotheses and identify the claim H0= (claim or not claim) H1= (claim or not claim) This hypothesis test is a (one tailed or two tailed) test Critical value(s)= t= (Reject or do not reject) the null hypothesis is there enough evidence to support the claim?

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