The life ofan electronic controller is distributed lognormally, with the parameters μ = 20 and σ...
question 19 b n=114 p=0.14 question 21 design life (50) months -2 motors? -3 motors? independentiy uf dle 19. What is the probability of having not more than 20 but not less than 10 failures if n Section 2.10) a Using the binomial distribution b Using the normal approximation 20. The life of an electronic controller is distributed lognormally, with the parameters μ = 20 and What is the probability that a controller will last (a) at least 50 h?...
Suppose the IQ is normally distributed with μ = 105 and σ=20. Answer the following questions. You need to write down the calculator function you use, and the data you input calculator. a. Find the 40th percentile IQ 5. b. Find the % of people whose IQ is higher than 120 c. If you want to be in top 10% IQ, your IQ has to be at least what? d, what is the cut off scores for IQ's of the...
A population is normally distributed with μ = 200 and σ = 20. a. Find the probability that a value randomly selected from this population will have a value greater than 250. P(x > 250) = ______ . (Round to four decimal places as needed.) b. Find the probability that a value randomly selected from this population will have a value less than 185. P(x < 185) = ______ . (Round to four decimal places as needed.) c. Find the...
A population is normally distributed with μ = 200 and σ = 20. a. Find the probability that a value randomly selected from this population will have a value greater than 250. P(x > 250) = ______ . (Round to four decimal places as needed.) b. Find the probability that a value randomly selected from this population will have a value less than 185. P(x < 185) = ______ . (Round to four decimal places as needed.) c. Find the...
3. The scores in a standardized test are normally distributed with μ 100 and σ 15. (a) Find the percentage of scores that will fall below 112. (b) A random sample of 10 tests is taken. What is the probability that their mean scoretis below 1122
Determine μx and σx from the given parameters of the population and sample size. μ=68 σ=20 n=29
Can someone please help me with this. Thank you much! 1. A population has parameters μ=36.3 and σ=57. You intend to draw a random sample of size n=139. What is the mean of the distribution of sample means? μ¯x=________________ b. A population of values has a normal distribution with μ=201.8 and σ=90.9. You intend to draw a random sample of size n=20. Find the probability that a single randomly selected value is less than 266.8. P(X < 266.8) _________________
etX be normally distributed with mean μ = 120 and standard deviation σ = 20. (a) Find z such that P(X > z) = 0.90. (b) Find z such that P(80 S X 100).
Q-3) 6 marks Hypothesis test for μ when σ is known. Suppose that the time it takes an electronic device in a car to respond to a signal from the toll plaza is normally distributed with mean 160 microseconds and standard deviation 30 microseconds. We would like to simulate 20 samples of size 25 to test the alternative hypothesis of the mean response time different from 160 microseconds at the level of significance 5%. MTB > random 20 cl-c25; SUBC>...
Please detailed answers and workings should be given. thank you 11) A random variable x is normally distributed with μ=22 and σ-5. Determine the distance, in units of standard deviations, between each of the following values of x and mean a) x-10 b) x-20 c) x-25 d) x-30 e) x-0 x=60 11) A random variable x is normally distributed with μ=22 and σ-5. Determine the distance, in units of standard deviations, between each of the following values of x and...