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Normal Distribution

Statistics - Normsdist and Tdist

Here are tables of the Standard Normal and Student's t distributions. The formulas for the first value in each P column are, respectively =NORMSDIST(A3) and =TDIST(C3,20,2), where column A is the one labeled "Z" and column C is labeled "t". "t". 1. What is the meaning of the number given in the P column under NORMSDIST? 2)

Normality and business research

1. R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution". What do you think he meant and what relevance does it have to your work?(Read the Week 2 Lecture 1 before answering) 2.How do you feel that the inferential statistical technique of Hypothesis Te

How much should a healthy kitten weigh?

How much should a healthy kitten weigh? A healthy 10-week-old (domestic) kitten should weigh an average of mu = 23.5 oz with 95% of data ranging from 13 to 34 oz. Let x be a random variable that represents the weight (in ounces) of a healthy 10-week-old kitten. Assume that x has a distribution that is approximately normal. m

Cable Companies - Normal Distribution

According to the Yankee group, 53% of all cable households rate cable companies as good or excellent in quality transmission. Sixty percent of all cable households rate cable companies as good or excellent in having professional personnel. Suppose 300 cable households are randomly contacted? a. What is the probability that m

Fresh Fruit Consumption - Normal Distribution

The Statistical Abstract of the United States published by the US Census Bureau reports that the average annual consumption of fresh fruit per person is 99.9 pounds. The standard deviate of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh f

A criminologist has developed a test to measure self-control. The test is normed so that it has a mean of 70 and a standard deviation of 20. The scores are normally distributed ...

A criminologist has developed a test to measure self-control. The test is normed so that it has a mean of 70 and a standard deviation of 20. The scores are normally distributed in the population of college students used to develop the test. a. What is the percentile rank of a score of 40? b What percentage of scores falls be

Combinations and Percentage Probabilities

5.50 A tax account has three choices for the method of treating one of a client's deductions. After this choice has been made, there are only two choices for how a second deduction can be treated. What is the total number of possibilities for the treatment of the two deductions? 5.51 A committed consists of eight members

Inverse Normal Distribution SAT and ACT Scores - For a given population of high school seniors, the schoolastic aptitude test (SAT) in mathemathics has a mean score of 500 with the standard deviation of 100. Another widely used test is the American college testing (ACT)exam. The mathemathics portion of the ACT mean of 18 and a standard deviation of 6 ...

For a given population of high school seniors, the schoolastic aptitude test (SAT) in mathemathics has a mean score of 500 with the standard deviation of 100. Another widely used test is the American college testing (ACT)exam. The mathemathics portion of the ACT mean of 18 and a standard deviation of 6. (a) Suppose that an en

Medical: Blood Protoplasm - Porphyrin is a pigment in blood

Medical: Blood Protoplasm - Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood. In healthy adults x is approximately normally distributed with the mean μ= 38

Sensitivity, Specificity and Predictive Value

Please see the attached file. 1. Directions: A screening test for breast cancer was administered to 400 women with biopsy-proven breast cancer and to 400 normal women without breast cancer. The screening test results were positive for 100 of the biopsy-proven cases and 50 of the normal women. Question 1: The sensit

Trading strategies involving options: Provide a table showing the relationship between the profit and final stock price for the following: bull spread using European call options, bear spread using European put options, butterfly spread using European call options, butterfly spread using european put options, straddle using options, strangle using options

Suppose that the price of a non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions. In each case provide a table showing the relationship between the profit and final stock price. Ignore the imp

Statistics - Normal Distribution: Four Questions

1. If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distribution in which 75.8% of the college students exceed when trying to find a parking spot in

Normal Distribution and Probability

1. Suppose a sample of n = 50 items is drawn from a population of manufactured products and the weight, X, of each item is recorded. Prior experience has shown that the weight has a probability distribution with mean = 6 ounces and standard deviation= 2.5 ounces. Which of the following is true about the sampling distribution

Normal distribution, mean, standard deviation, sampling distribution

The World Health Organization has reported that systolic blood pressures of Canadians are normally distributed with a mean of 121 and a standard deviation of 16. What symmetric interval about the mean will contain approximately 95% of the systolic blood pressure readings for Canadians? A. 105

Quantitative Methods Homework

Hello, Here are three quantitative methods problems. Thanks! -------------------------------- Prob 1 Bill and Joe are playing a match in which the first player to win 2 games wins the match. For any given game, the probability that Bill wins is 1/3. (a) Find the probability that Bill wins the match. (

Find the indicated probability.

Find the indicated probability. 4) A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 200 and 275. 5) In one region, the September energy consumption l

In its standardized form, the normal distribution

1. In its standardized form, the normal distribution a) has a mean of 0 and a standard deviation of 1. b) has a mean of 1 and a variance of 0. c) has an area equal to 0.5. d) cannot be used to approximate discrete probability distributions. 2. For some positive value of Z, the probability that a standard normal variable

Normality Assumptions of Populations

I have completed the problem. But I am knowing how to check the normality assumptions of both population. I used minitab for output. Lesson 10, Practice Problems 1. Problem 6.8: First check assumptions by verification that there are both (1) independent samples from the two populations and (2) that data in each sample are