Suppose we have a binomial experiment in which success is defined to be a particular quality or attribute that interests us. (a) Suppose n = 38 and p = 0.20. Can we approximate p̂ by a normal distribution? Why? (Use 2 decimal places.) np = nq = ---Select--- Yes No , p̂ ---Select--- can cannot be approximated by a normal random variable because ---Select--- np does not exceed both np and nq exceed nq exceeds nq does not exceed np exceeds np and nq do not exceed . What are the values of μp̂ and σp̂? (Use 3 decimal places.) μp̂ = σp̂ = (b) Suppose n = 25 and p = 0.15. Can we safely approximate p̂ by a normal distribution? Why or why not? ---Select--- Yes No , p̂ ---Select--- can cannot be approximated by a normal random variable because ---Select--- np does not exceed nq does not exceed both np and nq exceed np exceeds np and nq do not exceed nq exceeds . (c) Suppose n = 50 and p = 0.38. Can we approximate p̂ by a normal distribution? Why? (Use 2 decimal places.) np = nq = ---Select--- Yes No , p̂ ---Select--- cannot can be approximated by a normal random variable because ---Select--- np and nq do not exceed both np and nq exceed nq exceeds np does not exceed nq does not exceed np exceeds . What are the values of μp̂ and σp̂? (Use 3 decimal places.) μp̂ = σp̂ =

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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Suppose we have a binomial experiment in which success is defined to be a particular quality or attribute that interests us.

(a) Suppose n = 38 and p = 0.20. Can we approximate p̂ by a normal distribution? Why? (Use 2 decimal places.)

np =

nq =

---Select--- Yes No , p̂ ---Select--- can cannot be approximated by a normal random variable because ---Select--- np does not exceed both np and nq exceed nq exceeds nq does not exceed np exceeds np and nq do not exceed .

What are the values of μ_p̂ and σ_p̂? (Use 3 decimal places.)

μ_p̂ =

σ_p̂ =

(b) Suppose n = 25 and p = 0.15. Can we safely approximate p̂ by a normal distribution? Why or why not?
---Select--- Yes No , p̂ ---Select--- can cannot be approximated by a normal random variable because ---Select--- np does not exceed nq does not exceed both np and nq exceed np exceeds np and nq do not exceed nq exceeds .

(c) Suppose n = 50 and p = 0.38. Can we approximate p̂ by a normal distribution? Why? (Use 2 decimal places.)

np =

nq =

---Select--- Yes No , p̂ ---Select--- cannot can be approximated by a normal random variable because ---Select--- np and nq do not exceed both np and nq exceed nq exceeds np does not exceed nq does not exceed np exceeds .

What are the values of μ_p̂ and σ_p̂? (Use 3 decimal places.)

μ_p̂ =

σ_p̂ =

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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