Illustratian 19.6. The mean produce of wheat of a sample of 1C0fields comes to 200 kg. per acre with a standard deviation of l10 kg.Another somple of 150 fields gives the mean at 220 kg with astandard deviation of 12 kg. Assuming the standard deviation of theyield at 10 kg. for the universe, find out if there is significant diffe-rence between the mean yields of the two samples.

Given n1=100, n2=150, σ1=σ2=10, s1=10, s2=12 x̄1=200, x̄2=220

Answered: Illustratian 19.6. The mean produce of…

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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(24-6. Comment briefly on the following statements: (1) A computer obtained the standard deviation of 20 observations whose values ranged from 65 to 85 as 25. (11) A student obtained the mean and variance of a set of 10 observations as 10,-5 respectively. (111) The range is the perfect measure of variability as it includes all the measurements. (iv) For the distr bution of 5 observations : 8, 8, 8, 8, 8 ; mean = 8 and variance = 8. (v) If the mean and s.d. of distribution A are smaller than the mean and s.d. of distribution B respectively, then the distribution A is more uniform (less variable) than the distribution B. yatir ime a re.
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The relationship between temperatures in degrees Celsius Oc and degrees Fahrenheit Op is given by the equation Oc = (e - 32). For example, if it is 82°F now, then the temperature in degrees Celsius is Oc = (82 – 32) =x 50 = 27.7778. 5 %3D Suppose that the standard deviation of the body temperature of a random sample of 14 adult human beings has been computed to be 0.9°F. What will be the variance of body temperature for the same sampled individuals had the measurements been taken in degrees Celsius instead?
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The brain volumes (cm3) of 50 brains vary from a low of 908 cm3 to a high of 1478 cm3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 174.7 cm3, assuming the estimate is accurate if it is within 15 . The estimated standard deviation is nothing cm3. (Type an integer or a decimal. Do not round.) Compare the result to the exact standard deviation. A. The approximation is not accurate because the error of the range rule of thumb's approximation is greater than 15 cm3. B. The approximation is accurate because the error of the range rule of thumb's approximation is less than 15 cm3. C. The approximation is not accurate because the error of the range rule of thumb's approximation is less than 15 cm3. D. The approximation is accurate because the error of the range rule of thumb's approximation is greater than 15 cm3.
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cise 6. Remember, the mean and standard deviation of the n speed of 23.84 mph, with 40 hours describing weights of the yearling Angus steers in Exer- 16. Temperatures A town's January high temperatures a standard deviation of 3.56 mph. One car's z-score was a weight of 1152 pounds with 14. Unusual steers? Suppose a Normal model is useful for weights were 1152 lbs and 84 lbs. Which would be more in July the mean high temperature is 74° and the standard deviation is 8°. In which month is it more average 36°F with a standard deviation of 10°, v 11. Mensa sometimes classi points, wha a 22. More mean of 100 and a standa answ ar they a) I te in Exercise 6 had a mean b) A c) cise 7 were traveling at a mean 23. IQ: ans going? +3.2. How fast was that one a) b) c) unusual, a steer weighing 1000 pounds or one 1250 pounds? 15. Unusual cars? Suppose a Normal model is useful for describing speeds of Stanford cars in Exercise 7. Remem- ber, the mean and standard deviation of the speeds were 23.84 mph…
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