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Standard deviation of probability distribution for high temp in Nevada

Suppose the probability distribution for the high temp in Nevada on June 1 is normally distributed with a mean of 65 degrees. If a box plot was made it would have an IQR = 20 degrees. 1. What's the standard deviation of that probability distribution? I know the answer is 20 / 1.35 - where do you come up with the 1.35?

Probabilty that none watched any of the three sports last year

A survey of a group's viewing habits over the last year revealed the following information: 1. 28% watched gymnastics 2. 29% watched baseball 3. 19% watched soccer 4. 14% watched gymnastics and baseball 5. 12% watched baseball and soccer 6. 10% watched gymnastics and soccer 7. 8% watched all three sports Calcula

Statistics: Problems and Solutions

1.FREQUENCY DISTRIBUTION & DESCRIPTIVE STATISTICS: Open the CUMBA.xls file, which contains data from a random sample of 100 employees at Mock Company Inc. Create a Frequency Distribution of the YEARS OF EXPERIENCE for the employees using intervals of 0-4, 4-8, 8-12, 12-16 and 16-20. Also create the Descriptive Statistics for

Solving a Binomial Distribution Problem

Bill must sell three more cars this month to meet his quota. Tonight he has after-dinner appointments with five prospective customers, each of whom happens to be interested in a different car. If he has a %30 chance of success with each customer, what is the probability that he'll meet his quota by tomorrow morning? Suppose that

Probability: Problems and Solutions

1. A cooler contains 100 cans of soda covered by ice. There are 30 cans of cola, 40 cans of orange soda, 10 cans of ginger ale, and 20 cans of root beer. The cans are all the same size and shape. If one can is selected at random from the cooler, determine the probability that the soda selected will be cola or orange. 2. Brain

Decision Tree Analysis

Tech is playing state in the last conference game of the season. Tech is trailing state 21 to 14, with 7 seconds left in the game, when Tech scores a touchdown. Still trailing 21 to 20, tech can either go for 2 points and win or go for 1 point to send the game into overtime. The conference championship will be determined by t

Decision payoff table for sale of Christmas greeting cards.

6. The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. The cost of each box of cards is 3.00; each box will be sold for 5.00 during the Christmas season. After Christmas, the cards will be sold for 2.00 a box. The card section manager believe

Decision Analysis

Miramar Co. is going to introduce one of three new products: a widget, a hummer, or a nimnot. The market conditions (favorable, stable, or unfavorable) will determine the profit or loss the company realizes as shown in the following payoff table: Product favorable (0.2) Stable (0.7) Unfavorable (0.1) Widge

Statistics Simulation Problems: Hoylake Rescue Squad, Petroco Service Station

The Hoylake Rescue Squad receives an emergency call every 1,2,3,4,5, or 6 hours according to the following probability distribution. The squad is on duty 24 hrs per day, 7 days ... 2. The time between arrivals of cars at the Petroco Service Station is defined by the following probability distribution ... 3. The Dynaco Manufac

Statistics: Construct a binomial distribution for habits of other drivers

The graph below shows the results of a survey of drivers who were asked to name the most annoying habit of other drivers. You randomly select six people who participated in the survey and ask each one of them to name the most annoying habit of other drivers. Let x represent the number who named talking on cell phones as the most

Statistics: Probability of Die Rolls

A 6-sided die is rolled and depending on the result a ball is then chosen from one of three boxes. If the roll results in a 1 a ball is drawn from box A, if the roll results in a 2 or a 3 a ball is drawn from box B, and if the roll results in a 4, 5, or 6 a ball is drawn from box C. If box A contains 1 red, 6 white, and 3 black


The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random. (a) Find the probability that the family's monthly gaoline purchases will be between 88 and 98 gallons. (b) Find the probability that the

Statistics: JFC Engineering Company, chart employees

You have just been hired by the JFC Engineering Company. It is a mid-size company located in Phoenix, Arizona. Your prior experience has been with very small firms of less than ten employees, so you are excited about the opportunity of working for a much larger firm. You want to make sure and get to know as many of the employees

Probability of a big order is 0.4; probability of losing money this quarter is 0.5. Assuming that these are mutually exclusive events. Find the probability of getting the order or losing money.

The probability of getting a big order currently under negotiation is 0.4. The probability of losing money this quarter is 0.5. a. Assuming that these are mutually exclusive events. Find the probability of getting the order or losing money. b. Assuming that these are mutually exclusive events.Does this rule out the possibi


1. (10 points) The Pizza Company claims they will deliver your in less than 30 minutes. An undercover consumer reporter monitored a random sample of 30 pizza deliveries at a National outlet. The number of minutes to perform the delivery is reported below. 44, 12, 22, 31, 26, 22, 30, 26, 18, 28, 12, 40, 17, 13, 14, 17, 25, 2


The ratings for "driving distance off the tee" for the top 10 golfers on the PGA Tour are as follows: RANK PREV RANK PLAYER VALUE (YDS) 1 1 Scott Hend 318.90 2 2 Tiger Woods 315.20 3 3 Brett Wetterich 310.70 4 4 John Daly 308.50 5 6 Scott Gutschewski 308.40 6 5 Hank Kuehne 308.30 7 10 Davis Love III 304.30 How wou

Decision Analysis

1. The Oakland Bombers professional basketball team just missed making the playoffs last season and believes it needs to sign only one very good free agent to make the palyoffs next season. The team is considering four players: Barry Byr4d, Raneal O' Neil, Marving Johnson, and Michael Gordan. Each player differs accordign to

Probability for Accumulated Snowfall

Problem 1 Molly Dymond and Kathleen Taylor are considering the possibility of teaching swimming to kids during summer. A local swim club opens its pool each day so it is available to rent during the morning. The cost of renting the pool during the 10-week period for which Molly and Kathleen would need it is $1,700.


1. Suppose that for a 5-year-old automobile, the probability the engine will need repair in year 6 is 0.3, while the probability that the tires need replacing in year 6 is 0.8. The probability that both the engine will need repair and the tires will need replacing in year 6 is 0.2. What is the probability that the tires will nee


A. Assuming that the distribution of IQ is accurately represented by the bell curve in Figure 5.16, determine the proportion of people with IQs in each of the five cognitive classes defined by Herrnstein and Murray. Figure 5.16 The distribution of IQ (See the attachment) b. Although the cognitive classes above are defined

Finance calculations using excel

Our midterm is going to be similar to problems I have posted. I need assistance in completing these type of problems using excel. Can you please assist?

Z-Score and Probability

1: Given the standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in table E.2), what is the probability that A: Z is less than 1.57? B: Z is greater than 1.84? C: Z is between 1.57 and 1.84? D: Z is less than 1.57 or greater than 1.84? 2: The breaking strength of plastic bags used for p

Statistics Quantitative Analysis: Probability and frequency distribution

Probability A certain state is contemplating creating a weekly lottery, the revenues from which will be used to fund improvements in the state's public education system. The commission chartered to develop the guidelines for the proposed lottery envisions using a process whereby six (6) balls will be randomly selected from a