Please show clear solution 40 minutes remaining A machine produces metal axels used in an auto-mobile suspension system. A random sample of 15axels is selected, and the diameter is measured. The resulting data (in millimeters) are as follows:8.248.258.208.238.248.218.268.268.208.258.238.238.198.288.24Compute a 95% tolerance interval on the diameter of the axels.O a. None of the aboveO b.(8.156, 8.304)O c. (8.162, 8.298)O d. Insufficient Data

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Answered: A machine produces metal axels used in…

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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An entomologist believes that the median body length of lady beetles is 15.0 millimeters. A random sample of 16 lady beetles were measured and recorded as in the table below. 14.5 15.2 15.2 15.4 15.4 15.0 14.9 14.6 15.0 15.1 15.1 14.8 15.6 15.1 15.4 15.5 At α = 0.05, test the claim that the lady beetles’ body length is different from theestimated length.
A sample of 12 radon detectors of a certain type was selected, and each was exposed to 100 pCi/L of radon. The resulting readings were as follows: 105.6 90.9 91.2 96.9 96.5 91.3 100.1 105.5 99.6 107.7 103.3 92.4 Does this data suggest that the population mean reading under these conditions differ from 100? State the null and alternative hypotheses. Calculate, correct to 2 decimal places, the sample mean, x ; and the sample standard deviation, s. Evaluate the appropriate test statistic. Test these hypotheses at 05 level of significance.
Construct an interval estimate for the given parameter using the given sample statistic and margin of error.(a) For μ, using x̄=98 with margin of error 16.(b) For p1-p2, using p̂1-p̂2 = 0.165with margin of error 0.025
Compute the range and sample standard deviation for strength of the concrete (in psi). 3910, 4090, 3500, 3100, 2940, 3830, 4090, 4040
A synthetic jewelry producer reports that a new procedure is only profitable if the average weight of the resulting diamonds is greater than 0.4 karat. She created six sample diamonds out of the new procedure and recorded their weights as follows: 0.36, 0.41, 0.42, 0.38, 0.47, and 0.34 karat. Do the six measurements present sufficient evidence to indicate that the new process is profitable? Test at 0.01 level of significance using the p-value method.
Two samples, one of size 20 and the second of size 19, are selected to test the difference between two independent population means. How many degrees of freedom are used to find the critical value? Assume the population standard deviations are unknown but equal. Multiple Choice 39 38 37 20
Consider the following sample observations on stabilized viscosity of asphalt specimens. 2,762 2,907 3,012 2,813 2,876 Suppose that for a particular application, it is required that true average viscosity be 3,000. Does this requirement appear to have been satisfied? State the appropriate hypotheses. (Use ? = 0.05.) H0: ? > 3,000 Ha: ? < 3,000 H0: ? = 3,000 Ha: ? ≠ 3,000 H0: ? ≠ 3,000 Ha: ? = 3,000 H0: ? < 3,000 Ha: ? = 3,000 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = What can you conclude? Reject the null hypothesis. There is sufficient evidence to conclude that the true average is viscosity differs from 3000.Do not reject the null hypothesis. There is sufficient evidence to conclude that the true average is viscosity differs from 3000. Reject the null hypothesis. There is not sufficient evidence to conclude that…
Given the same R software output below, is there sufficient evidence to say that the mean diameter of Penicillium roqueforti colonies grown on petri dishes filled with malt extract agar is not equal to 40.0 mm, at 5% level of significance?
In a comparison of two methods for the determination of chromium in rye grass, the following results were obtained: Method A, mean(mg/kg Cr)=1.48 Standard deviation(mg/kg Cr)=0.28 n= 6 Method B, mean (mg/kg Cr)=2.33 Standard deviation(mg/kg Cr)=0.31 n=10 Is the precision of these two methods significantly different? Do these two methods give results with means which differ significantly? a=0.05
A random sample of 11 size AA batteries for toys yield a mean of 2.98 hours with standard deviation, 1.19 hours. (a) Find the critical value, t?/2, for a 99% CI. ??/2 = (b) Find the margin of error for a 99% CI.
It is commonly thought that SUVs and vans are safer than cars. If an SUV and a car are in a collision, does the SUV sustain less damage and thus need a cheaper repair? We performed 7 sample crashes of SUVs at 10mph into the rear ends of stopped cars. See the table of normal data below. SUV into car SUV damage ($) Car damage ($) CRV into Civic 1721 1274 Rav4 into corolla 1434 2327 Tucson into Forte 850 3223 Tiguan into Golf 2329 2058 Patriot into Caliber 1415 3095 Escape into Focus 1470 3386 Rogue into Sentra 2884 4560 Would you be able to say that SUVs are safer since they need less repairs? Should I use: confidence intervals z-score A cause/correlation/regression or Chi-Squared hypothesis tests
A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below. Process A Process B Mean 0.002mm 0.0026mm Standard Deviation 0.0001mm 0.00012mm Sample Size 12 14 The researcher is interested in determining whether there is evidence that the two processes yields different average errors from the industry standard. Assume calculated t to be +2.70, at the 0.01 level of significance what would be the decision? Reject the null…

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