30. What is the true level of significance fore=0.05 for a 2-tail distribution? *O A. 0.827O B. 0.975O C. 0.482O D. 0.573

Answered: 30. What is the true level 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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-5. The weight of a certains species of fish is normally distributed with mean of 4.25 Kg and standard deviation of 1.2 a) What proportion of fish are between 3.5 kg and 4 kg b) What is the probability that a fish caught will have a weight of at least 5kg? 31
1. The test scores of an Engineering Mechanics class with 800 students are distributed normally with a mean of 75 and a standard deviation of 7. a. What percentage of the class has a test score between 68 and 82? b. Approximately how many students have a test score between 61 and 89? c. What is the probability that a student chosen at a random has a test score between 54 and 75? d. Approximately how many students have a test score greater than or equal 96
Calculate the variance for the distribution given in the attached, A. 429.84 / B. 492.98 / C. 924.86 / D. 942.99
4.2 9
in "a" the blank is "z" and "t" distribution
21. Birth weights of babies born to full-term pregnancies follow roughly a normal distribution. At Asian Hospital, the mean weight of babies is 7 Ibs with a standard deviation of 14oz. (1 lb = 14 o). Dr. Watts has four deliveries coming up during the night. Assume the birth weights of these babies can be viewed as a simple random sample. 16. What is the probability that the average weight of the four babies will be more than 7.5 Ibs? 0.65% 30.85% 15.87% 12.65%
38)
45. Suppöse the average height of NBA players is normally distributed with mean 200cm and standard deviation 8.89cm. What is the probabilíty that a randomly selected players will have a height between 190cm and 210cm? M= 200 a. 0.7288 b. 0.7372 8=8.89 C. 0.1314 d. 0.7698 e. 0.8686
3. Let X be the mean of a random sample of n = 25 from the distribution with a mean of 30 and a variance of 9. Find an approximated probability that the sample mean is between 29.8 and 30.6.

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30. What is the true level of significance for e=0.05 for a 2-tail distribution? * O A. 0.827 B. 0.975 О с.0.482 O D. 0.573