Chapter 13: Chi-Square Applications SHORT ANSWER 1. When samples of size n are drawn from a normal population‚ the chi-square distribution is the sampling distribution of = ____________________‚ where s2 and are the sample and population variances‚ respectively. ANS: PTS: 1 OBJ: Section 13.2 2. Find the chi-square value for each of the right-tail areas below‚ given that the degrees of freedom are 7: A) 0.95 ____________________ B) 0.01 ____________________ C) 0.025 ____________________
Premium Normal distribution Statistical hypothesis testing Variance
The Normal and Lognormal Distributions John Norstad j-norstad@northwestern.edu http://www.norstad.org February 2‚ 1999 Updated: November 3‚ 2011 Abstract The basic properties of the normal and lognormal distributions‚ with full proofs. We assume familiarity with elementary probability theory and with college-level calculus. 1 1 DEFINITIONS AND SUMMARY OF THE PROPOSITIONS 1 Definitions and Summary of the Propositions ∞ √ Proposition 1: −∞ 2 2 1 e−(x−µ) /2σ
Premium Normal distribution Cumulative distribution function
HOMEWORK 2 FROM CHAPTER 6 and 7‚ NORMAL DISTRIBUTION AND SAMPLING Instructor: Asiye Aydilek PART 1- Multiple Choice Questions ____ 1. For the standard normal probability distribution‚ the area to the left of the mean is a. –0.5 c. any value between 0 to 1 b. 0.5 d. 1 Answer: B The total area under the curve is 1. The area on the left is the half of 1 which is 0.5. ____ 2. Which of the following is not a characteristic of the normal probability distribution? a. The mean and median are equal
Premium Normal distribution Standard deviation
Distribution models of few mobile phone companies: Apple Apple has sold the iPhone through Indian telecom providers‚ who bundle the phones with data services. As Indian telecom companies don’t subsidize the cost of iPhones‚ as in the U.S.‚ these sales have been limited. Recently tied up the local operations of Ingram Micro Inc and Redington (India) Ltd.‚ a local distributor with 12‚000 smaller partners across the country Samsung The Distribution of Samsung mobile phones is divided by zones
Premium Mobile phone
Jones Electrical Distribution case Jones Electrical Distribution is a wholesaler of electrical components and devices to general contractors and electricians. Although Jones Electrical Distribution has been profitable in the past few years‚ the company experiences a drain on its cash when it attempts to maintain a rapid growth while taking advantage of trade discounts at the rate of 2%. Problems faced by Jones Electrical Distribution are as follows: Should the company maintain a rapid sales growth
Premium Financial ratios Financial ratio Generally Accepted Accounting Principles
The Distribution of Fast Food Sociology 029 Adaku Nathan Dr. Harris March 7‚ 2014 Abstract The topic of African American health appeals to me because of the tremendous lack of knowledge in the black community on the subject matter of living a healthy lifestyle. Fast food has been viewed in the minority cohort as a means of daily substance‚ specifically to African Americans living in Los Angeles. The fast food industry has strategically placed chains of cheap and easily accessible food in
Premium Nutrition Fast food Junk food
Patricia Pupo Professor Matthew Sang PHI 2604 26 November 2014 Income Distribution This essay will discuss if current income distribution has a negative impact in the society because of the inequality that exists. What is income distribution? It is how a national income is split between different groups. Rights theory worries as the name says it‚ about people rights‚ and action is good if it respects the people’s rights. There are two kinds of rights‚ positive and negative. The first one relates
Premium Rights Economic inequality Distribution of wealth
2.3. The Chi-Square Distribution One of the most important special cases of the gamma distribution is the chi-square distribution because the sum of the squares of independent normal random variables with mean zero and standard deviation one has a chi-square distribution. This section collects some basic properties of chi-square random variables‚ all of which are well known; see Hogg and Tanis [6]. A random variable X has a chi-square distribution with n degrees of freedom if it is a gamma
Premium Normal distribution Variance Probability theory
Special Probability Distributions Chapter 8 Ibrahim Bohari bibrahim@preuni.unimas.my LOGO Binomial Distribution Binomial Distribution In an experiment of n independent trials‚ where p is a the probability of a successful outcome q=1-p is the probability that the outcome is a failure If X is a random variable denoting the number of successful outcome‚ the probability function of X is given P X r nCr p r q nr Where q=1-p r=0‚1‚2‚3‚….. X~B(n‚p) The n trials
Free Probability theory Normal distribution Random variable
1. What’s it like to work at Google? (Hint: Go to Google’s Web site and click on About Google. Find the section Jobs at Google.) What’s your assessment of the company’s work environment? In my opinion‚ a lot of people want to work with Google because of high salary. They all think that they can get rich from working in there. If you see in this case‚ Google company is the top ten companies and Fortune Magazine ranked Google company to be number one to work with in best company category so employees
Premium Google Employment