Thank you for your support . I asked this earlier and was provided inaccurate information . 7:15 1.ull LTEAAA myopenmath.comQuestioTTB 0.33/1 pt O 2 97 O DetailsThe heights of adult men in America are normallydistributed, with a mean of 69.1 inches and astandard deviation of 2.69 inches. The heights ofadult women in America are also normallydistributed, but with a mean of 64.7 inches and astandard deviation of 2.56 inches.a) If a man is 6 feet 3 inches tall, what is his z-score(to two decimal places)?Z =b) If a woman is 5 feet 11 inches tall, what is her z-score (to two decimal places)?Z =c) Who is relatively taller?The 5 foot 11 inch American womanThe 6 foot 3 inch American manSubmit Question

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Answered: The heights of adult men in America are…

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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A random sample of size n is chosen from a normally distributed population with a mean of µ and known standard deviation 6. a) Compute a 95% CI for µ if the sample mean is 41 and n = 25. b) Compute a 95% CI for µ if the sample mean is 41 and n is 49. c) What sample size is needed to create a 95% CI for µ with a width that is no greater than 2? d) Check your work by calculating a 95% CI for µ given x = 41 using the sample size from part c).
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.
In a test of H0: p = .43 versus Ha: p ≠ .43, a sample of size 1500 leads to a p-value of 0.087. Which of the following must be true if a = 0.05? A. The Ho should be rejected at the 5% level B. The Ho should fail to be rejected at the 5% level C. The Ho should be accepted at the 5% level
A vehicle with a particular defect in its emission control system is taken to a succession of randomly selected mechanics until r = 16 of them have correctly diagnosed the problem. Suppose that this requires diagnoses by 20 different mechanics (so there were 4 incorrect diagnoses). Let p = P(correct diagnosis), so p is the proportion of all mechanics who would correctly diagnose the problem. What is the mle of p? p̂ = Is it the same as the mle if a random sample of 20 mechanics results in 16 correct diagnoses? Explain. No, the formula for the first one is (number of failures)/(number of trials) and the formula for the second one is (number of successes)/(number of failures). No, the formula for the first one is (number of failures)/(number of trials) and the formula for the second one is (number of successes)/(number of trials). Yes, both mles are equal to the fraction (number of successes)/(number of failures). No, the formula for the first one is (number of…
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: 104.3 89.6 89.9 95.6 95.2 90.0 98.8 103.7 98.3 106.4 102.0 91.1 a)Does this data suggest that the population mean reading under these conditions differs from 100? State and test the appropriate hypotheses using =.05. b) Suppose that prior to the experiment, a value of teta=7.5 had been assumed. How many determinations would then have been appropriate to obtain beta=.10 for the alternative u=95 ?
A truck company decides that every year, the distance traveled for the truck usually distributed normally with average traveled 50.0 thousands miles and the standart deviation os 12.0 thousands miles Questions A. How many of the 1,000 trucks in the fleet are expected to cover between 30.0 and 60.0 thousand miles this year B. How many miles will at least 80% of the trucks travel C. How many of the 1,000 trucks in the fleet are expected to cover between 30.0 and 60.0 thousand miles this year, if the standart deviation is changed to 10 thousands miles
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
Ex 6.14 modified as follows: In a random sample of 55 panels, the average failure time is 2.07 years and the standard deviation is 1.11 years. Find the 91.7% CI for the population mean failure time

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