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# Probability

### Base Level Statistics

4. Use the appropriate table of areas to find the specified area under the standard normal curve to find the area that lies between 0 and 3.01 a. 0.9987 b. 0.4987 c. 0.1217 d. 0.5013 5. Find the probability of at least 2 girls in 6 births. Assume that male and female births are equally likely and that t

### Companies using descriptive statistics and probability distributions

How do insurance companies use descriptive statistics and probability distributions to project health and auto insurance premiums? In regards to age, why is there an inverse relationship between the two premiums?

### Statistics questions....

This is a statistics question that I cannot get a handle on, so I would appreciate your help. Please show the work for future reference. Thank you very much. A study of Hub Furniture regarding the payment of invoices reveals the time from billing until payment is received follows the normal distribution. The mean time until

### Question about Compute the probability

A population of unknown shape has a mean of 75. You select a sample of 40. The standard deviation of the sample is 5. Compute the probability the sample mean is: a. Less than 74. b. Between 74 and 76. c. Between 76 and 77. d. Greater than 77.

### Quantitative methods portion of the CPA

It is estimated that 10 percent of those taking the quantitative methods portion of the CPA examination fail that section. Sixty students are taking the exam this Saturday. a. How many would you expect to fail? What is the standard deviation? b. What is the probability that exactly two students will fail? c. What is the proba

### Probability

If you ask three strangers about their birthdays, what is the probability: (a) All were born on Wednesday? (b) All were born on different days of the week? (c) None were born on Saturday?

### Binomial distribution in business applications

The binomial distribution is regularly used in business applications. Why do you think this is the case? Can you give me two examples from a professional environment. Can you define binomial distribution?

### The use of z-scores to determine probability

The instructions are typed exactly, word for word, from the text book. I am just as confused as you are, if not more. I wish I could give you more info, but that is all I have. The book is poorly written. The book has not covered Test Statistics yet, therefore that is not needed. The three chapters leading up to this assign

### Probability Application: Bank Accounts

A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both. If a customer is chosen at random, what is the probability the customer has either a checking or a savings account? What is the probability the customer does not have either a checking

### Statistical Concepts: Determining Probability

A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report. Ten percent read both Time and U.S. News and World Report. a. What is the probability that a particular top executive reads either Time or U.S. News and World Rep

### Lottery and Statistics

A lottery involves drawing five white balls out of a drum with 55 balls and then drawing one red ball out of a drum with 42 red balls. (Hint: these are two separate events.) You can buy a \$1 ticket and select five white numbers (from 1 to 55 inclusive) and one red number (from 1 to 42 inclusive). You win the lottery if you pick

### Fault Tree Analysis

Assume the probability of a tire blowout is 0.102% per 50,000 miles of use and that a person travels 13,000 miles per year in a car. Assume that the probability of loss of control is 30% if the blowout occurs on the front tires and 15% for the rear tires. If control is lost, the probability is 50% of veering to the right and 50%

### Probabilities

A. CoffeeTime is considering selling juices along with its other products. Prob *val= States of Nature High Sales Med. Sales Low Sales A(0.2) B(0.5) C(0.3) A1 (sell juices) 3000 2000 -6000 A2 (don't sell juices) 0 0 0 The probabilities shown above represent the states of nature and the decision maker's (

### Random Variables Problem Set

Please provide step by step solution with all work shown for the attached problem sets. It is important to see the steps required to solve the problems so I can understand the process for future problems: (see attachment) 1. A die is loaded so that the probability of any side showing is proportional to the number on that side

### Statistical Reasoning Questions

I need some help with these statistic problems, with step-by-step detailed answers for my understanding: Item 1 Two students are in the same mathematics class. On 14 out of 15 quizzes, student A has outscored student B by at least 10 points. Which of the following statements best describes this situation? Explain your reaso

### Binomial probabilities and sample probabilities

A normal population has a mean of 80.0 and a standard deviation of 14.0. Compute the probability of a value between 75.0 and 90.0. Compute the probability of a value 75.0 or less. Compute the probability of a value between 55.0 and 70.0. In a binomial situation n = 4 and p = .25. Determine the probabilities of the following e

### Probability and mutual exclusivity

A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report. Ten percent read both Time and U.S. News and World Report. What is the probability that a particular top executive reads either Time or U.S. News and World Report reg

### Provide an example of a couple of variables that we work with that could meet the binomial criteria above.

1) Classify events into success or failure 2) P(success) stay the same on each trial 3) Counting the number of successes 4) Discrete data 5) Independence Provide an example of a couple of variables that we work with that could meet the binomial criteria above.

### Purpose of a survey and its characteristics

What is the purpose of a survey? What are three examples of a survey and what potential purpose could each be used for? How can one work to ensure the participants of a survey will have their responses kept private? How can one work to ensure that information gained from a survey is unbiased? Would planning and having ample time

### Assessing probabilities and converting to a similar scale

Stacy is considering inviting Ned to lunch for Valentines Day and would strongly prefer NOT to run into her ex-boyfriend Jim while having lunch with Ned. Knowing Jim's dining preferences quite well, she assesses the following probabilities for Jim eating at the various restaurants as (1) Sam's Pizza, 0.1 (2) Sy's Sandwiches, 0.2

### Probability and Statistics - Intervals

The problem is about Intervals based on a n normal population distribution. Please see the attached file for the problems. I need a solution that is detailed and with explanation. It would be very helpful to me. The final answers in my book are: a.(.888, .964) b.(.752, 1.100) c.(.634, 1.218)

### standard normal distribution table..

A normal population has a mean of 80.0 and a standard deviation of 14.0. a. Compute the probability of a value between 75.0 and 90.0. b. Compute the probability of a value 75.0 or less. c. Compute the probability of a value between 55.0 and 70.0

### Random Selection in Probability

A survey in March, 1994 issue of Life magazine indicated that nine out of ten Americans pray frequently and earnestly. A poll is now taken of 1000 randomly selected Americans. Assuming the 1994 survey is still accurate, find the probability that at least 925 of those polled will indicate that they pray earnestly.

### Sample proportion

Suppose that 15% of all adults jog. An opinion poll asks a simple random sample of 500 adults if they jog. a) What is the sampling proportion in the sample who jog? b) According to the 68-95-99.7 rule what is the probability that the sample proportion who jog will be 11.8% or greater?

### Testing of a hypothesis based on a single sample

The 3 problems are from the topic "Test of Hypothesis Based on a Single Sample" of Probability and Statistic. I need assistance with these problems. Need to find out the correct solution and answers. 9. Two different companies have applied to provide cable television service in a certain region. Let p denote the proportion

### Probability

According to an article appearing in the Wall Street Journal, about 70% of all U.S. households have a cellular phone. suppose that you are conducting a survey of customer satisfaction regarding their cellular phone. If you called 11 households selected at random, what is the probability that: (a) every household has a cellul

### Probability Distributions

(See attached files for full problem description) --- Using our data set from Unit 1, compose an email to the head of the American Intellectual Union which discusses the following: 1. How you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals? Job Satisfaction is an attitude a

### What is the probability that the employee is female? The complement of A is. Use two digit random numbers, start with random number 00 and determine the random number ranges for the data set given above. How many units can be sold at the \$10 price? What is the probability of getting an A on the paper? Complete the table to make this a valid probability distribution. Compute the variance. Compute the standard deviation. What decision should be made by the optimist? What decision should be made by the conservative? What decision should be made using minimax regret? Using these random numbers, simulate the drying time for 5 processes. Use a four period moving average to forecast attendance at baseball games.

18. Employees of a local company are classified according to gender and job type. The following table summarizes the number of people in each job category. Male (M) Female (F) Job Administrative (AD) 110 10 Salaried staff (SS)

### Normal probability distribution

The mean of normal probability distribution is 60; the standard deviation is 5. a. About what percent of the observations lie between 55 and 65? b. About what percent of the observations lie between 50 and 70? c. About what percent of the observations lie between 45 and 75 ? (See attached file for full problem description)

### Statistics Questions

8. In Syed's town there are 11,303 Hindi speakers. In Rajiv's town there are 19,251 Hindi speakers. In Jon's town there are 1,092 Hindi speakers. For this situation, what is the variable under consideration? 9.The members of a board of directors have the following roles: president (P), vice president (V), secretary (S),