Answered: What is probability? It is known that…

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Counting And Probability

Section: Chapter Questions

Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...

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2. What is probability? It is known that typhoid in a rural community has a prevalence of 5%. Determine the probability of finding 3 of such individuals from 10 randomly selected persons in the community. (i) Determine the probability of finding more than 3 of such individuals from 10 randomly selected persons in the community. (ii) The mean weight of students in a university is 65 Kg with a standard deviation of 5kg. What would be the probability of finding students with weight between 60kg and 70kg. (Assume weight to be normally distributed).?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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