
2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The price of cars is normally distributed. a. What is a Z score for a car with a price of $ 33,000?

2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The price of cars is normally distributed. a. What is a Z score for a car with a price of $ 33,000? 9.415000 b. What is a Z score for a car with a price of $...

2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The price of cars is normally distributed. a. What is a Z score for a car with a price of $ 33,000? b. What is a Z score for a car with a price of $30,000? c...

In this question, use Excel functions rather than Normal distribution tables. The number of new cars sold by "Ma's New Car Factory" in a financial year can be approximated by a normal distribution with a mean of 125,000 cars and a standard deviation of 34,000 cars. Part A In ...

The US Environmental Protection Agency reports the average fuel costs for various makes of cars. In recent years the fuel costs for mid‐size Japanese cars averaged $1200. Suppose that the annual fuel costs for various makes of automobiles are normally distributed and ...


WEB CALCULATOR EXERCISE Descriptive Statistics 1 The table below presents data for a sample of people who completed a religious survey. Age Gender Denomination Church Attendance 56 1 7 4 46 2 6 5 49 2 6 5 49 1 1 5 27 2 9 5 51 1 4 2 47 2 2 3 67 1 5 4 49 2 2 6 33 1 12 6 55 2 9 5...

the police officer also gathered data on the speedsx, in kilometers per hour (km/h) of some cars as they drove down the hill towards her car. the speed limit is 50 km/h. Analysis of the results showed that the speeds of cars were normally distributed with a mean speed of 56 km...

Coal is carried from a mine in West Virginia to a power plant in Pittsburgh in hopper cars on a long train. The automatic hopper car loader is set to put 75 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed with an average of ...

The accompanying table shows a car manufacturer’s total cost of producing cars: Qty TC Variable Costs Avg. Var. Costs Avg. Total Costs Avg. Fixed Costs 0 $500,000        1 540,000  2 560,000  3 570,000  4 590,000  5 620,000  6 660,000  ...

A survey found that women's heights are normally distributed with mean 63.5 in. and standard deviation 2.3 in. The survey also found that men's heights are normally distributed with a mean 68.7 in. and a standard deviation 2.8. (a) Most of the live characters at an amusement ...

The following table indicates the prices various buyers are willing to pay for a Miata sports car: Buyer A Maximum price $50,000 Buyer B Maximum price $40,000 Buyer C Maximum price $30,000 Buyer D Maximum price $20,000 Buyer E Maximum price $10,000 The cost of producing the ...

The following table indicates the prices various buyers are willing to pay for a Miata sports car: Buyer A Maximum price $50,000 Buyer B Maximum price $40,000 Buyer C Maximum price $30,000 Buyer D Maximum price $20,000 Buyer E Maximum price $10,000 The cost of producing the ...

A random sample of 20 customers who drive luxury cars showed that their average distance driven between oil changes was 3187 miles with a sample standard deviation of 42.50 miles. Another sample of 10 customers who drive compact lowerprice cars resulted in an average distance...

7. The table below shows the probability distribution of the types of food purchased by students from the school cafeteria. What is the probability a student has purchased Caesar salad? (2 points) 0.17 Suppose houses are available for purchase during construction of a new ...

The table below shows the probability distribution of the types of food purchased by students from the school cafeteria. What is the probability a student has purchased Caesar salad? (2 points) 0.17 Suppose houses are available for purchase during construction of a new housing...


You survey 1000 new home buyers and find that the mean price was $185,000 and the standard deviation was $20,000. How many paid more than $210,000?

A used car dealership has found that the length of time before a major repair is required on the cars it sells is normally distributed with a mean of 10 months and a standard deviation of 3 months. If the dealer wants only 5 percent of the cars to fail before the end of the ...

improved technology in the production of small cars often results in lower production costs? which of the following will most likely result from these reduced production costs? (1)the price of domestic small cars will decrease. (2)the demand for domestic small cars will ...

Improved technology in the production of small cars often results in lower production costs. Which of the following will most likely result from these reduced production costs? 1)the price of domestic small cars will decrease. 2)the demand for domestic small cars will decrease...

A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold $15,000 3 $20,000 4 $23,000 5 $25,000 2 $45,000 1 A.Find the mean and median B. Which measures best represents the ...

A chemist test involves measuring two independent quantities A and B, the expressing the results of the test as C such that C= 3A0.5B. Give that A is normally distributed with mean 10 and standard deviation of 1, and B is also normally distributed with mean 34 and standard ...

8) A consumer groups tries to determine the most expensive items in a convenience store. Four items are purchased in the convenience store and compared to the average price in stores in the area. Assume tat the price distribution is normal. Use your calculator to determine the...

You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

You want to buy a new car, and you are thinking about two alternatives, car A and car B. You like both cars, and you are considering keeping whichever one you buy for many years to come. As a result, you want to evaluate the total cost of ownership of both cars over many years...

A police officer gathered data on the speeds, in kilometres per hour (km/h), of some cars as they drove down hill towards her car. The speed limit is 50 km/h. Analysis of the results showed that the speeds of the cars were normally distributed with a mean speed of 56 km/h and ...


The number of cars sold annually by used car salespeople is normally distributed with a standard deviation of 19.22. A random sample of salespeople was taken and the number of cars each sold is listed her. 79 43 58 66 101 63 79 33 58 71 60 101 74 55 88 The 95% confidence ...

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.)

1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ...

1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ...

1. Gas Mileage Problem The EPA efficiency rating Ina particular model of new car says that the car is expected to get 22.7 miles per gallon (mpg) of gasoline. Assume that the standard deviation is 1.4 mpg and that the actual mileage are normally distributed about 22.7. The ...

suppose that prices of a certain model of new homes are normally distributed with a mean of $150,000 use 689599.7 rule to find the percentage of buyers who paid: between $150,000 and $152,000 if the standard deviation is $1200

Which of the following accurately describes a surplus? Consumer demand for a certain car is below the number of cars that are produced. The production costs for a certain car are below the sale price of that car. A car company tries to charge too high a price for a car and has...

Can any one help me with this? ThermoStar has been producing residential thermostats for over 50 years. Looking over the past 20 quarters (5 years) of the different product lines, the general manager has been trying to get a handle on sales, costs, and production, and has ...

Assume that the average annual salary for a worker in the United States is $30,500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6,250. Find the following: (A) What percentage of Americans earn below $19,000? (B) What ...

Assume that the average annual salary for a worker in the United States is $30,500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6,250. Find the following: (A) What percentage of Americans earn below $19,000? (B) What ...


a tire manufacturer believes that the tread life of its tires are normally distributed and will lst an average of 60,000 miles with a standard deviation of 3,000 miles. sixtyfour randomly selected tires were tested and the average miles where the tire failed were recorded. ...

The monthly earnings of teachers is normally distributed with a mean of $3,000 and the standard deviation of $250. We select a sample of 87 teachers. The sampling distribution of the sample mean has an expected value and standard deviation of: a.) 3,000 and 26.8 b.) 3,000 and ...

According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are normally distributed and that the standard deviation is $7,500. a. What is the probability of a woman receiving a salary between $60,000 and $75,000...

Suppose that the mpg rating of Passengers Cars is a normally distributed random variable with a mean and a standard deviation of 33,8 mpg and 3,5 mpg. Question : an automobiles manufacturer wants to build a new Passenger car with an mpg rating that improves upon 99% of ...

automoniles arrive at the drivethrough windom at a post office at the rate of 4 every 10 minutes. the average service time is 2 minutes. the poisson distributimes are exponentially distributed. (A) what is the average time a car is in the system? (b) what is the average ...

The average price of gasoline lately has been hovering lately at $3.80. What is the standard deviation if the probability that a gallon of gas costs less than $3.00 is 15%?

The average price of gasoline lately has been hovering lately at $3.80. What is the standard deviation if the probability that a gallon of gas costs less than $3.00 is 15%?

Can someone please help me with the following math problems? I am totally lost and confused. Calculate the range, average deviation, and standard deviation for the following five distributions: A. 1, 2, 3, 4, 5, 6, 7, 8, 9 B. 4, 3, 2, 1, 0, 1, 2, 3, 4 C. 10, 20, 30, 40, 50...

two junked cars were sold at auction to a buyer who paid a total of $2,000 for both cars. If the more expensive of the two cars was $240 less than three times the price of the cheaper car, how much was the more expensive car? how do I solve this word problem?

The number of cars sold annually by used car salespeople is normally distributed with a standard deviation of 18. A random sample of 310 salespeople was taken and the mean number of cars sold annually was found to be 71. Find the 94% confidence interval estimate of the ...


Question2: When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked is given below X 1 2 3 4 5 6 7 8 f(X) 0.30 0.24 0.17 0.10 0.08 0.05 0.04 0.02 a. ...

12 The number of cars sold annually by used car salespeople is normally distributed with a standard deviation of 19.22. A random sample of salespeople was taken and the number of cars each sold is listed her. 79 43 58 66 101 63 79 33 58 71 60 101 74 55 88 The 95% confidence ...

A manufacturer of a new car claims the typical car will average 32 mpg of gasoline. An independent consumer group is skeptical of the claim and thinks the mean gas mileage is significantly different than the 32 claimed. A sample of 23 randomly selected cars produced a mean mpg...

7. Professors’ Salaries The average salary for a Queens College full professor is $85,900. If the average salaries are normally distributed with a standard deviation of $11,000, find these probabilities. a. 0.3557 (TI: 0.3547) a. The professor makes more than $90,000. b. The...

Car seat belts are tested for strength, and it is found the results are normally distributed with a mean of 2400 lb and a standard deviation of 400 lb. Using the 689599.7 rule, find the percentage of scores between 1600 lb and 3200 lb.

The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is moundshaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by ...

The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is moundshaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by ...

The average salary for graduates entering the actuarial field is $40,000. If the salaries are normally distributed with a standard deviation of $5000 (σ = 5000), find the probability that a graduate will have a salary over $45,000: P(X > 45,000).

The duration of time it takes General Motors to build a car is normally distributed with a mean of 31 hours and a standard deviation of 2 hours. a) What is the probability that a single car, selected at random, will take between 28 and 34 hours? b) What is the probability that...

Two training classes took a test and the results were marked on the scale zero to one hundred. The first group got an average score of 75, with the standard deviation of 8. The second group got an average of 65, with the standard deviation of 4. How do these two groups compare?


Two training classes took a test and the results were marked on the scale zero to one hundred. The first group got an average score of 75, with the standard deviation of 8. The second group got an average of 65, with the standard deviation of 4. How do these two groups compare?

The salaries at a corporation are normally distributed with an average salary of $29,000 and a standard deviation of $4,000. What is the probability that an employee will have a salary between $22,520 and $23,480? Enter your answer rounded to exactly 4 decimal places.

In 2015, the average price of new homes in a certain suburb was $145,000. Assume that this mean is based on a random sample of 1000 new home sales and that the sample standard deviation is $24,000. Construct a 99% confidence interval for the 2002 mean price of all such homes.

Please check my answers if they are correct! If not, please make corrections. Thank you! Bob, owner of Bob’s Auto, sells cars. The number of car sales is represented by y. Bob buys autos at a price of A each and has no other costs. He only buys as many cars as he sells. a) ...

3. Piyush, who had joined the infrastructure department of the bank, was asked to estimate the rental value of commercial property at Ranchi, for the purpose of identifying suitable premises for locating a new branch. Piyush assessed the standard deviation of the value of the ...

1.The management committee of Zenith has indicated its desire to accept only 40% of all continuing undergraduate based on the results of the endofsecond semester examinations.the mean score of the examination is 500 and standard deviation of 100.Find the cut off score for ...

The distribution of student loan amounts for students is normally distributed ranging from zero to $100,000. Use your knowledge of the Empirical Rule to approximate the standard deviation of the dataset? A) approximately $21,000 B) approximately $12,500 C) approximately $19,...

a survey of 20 colleges found that seniors graduated with an average $12000 in debt from student loans. The debt was normally distributed with a standard deviation of $3200. Find the probability that a senior graduated owing more than $16000.

The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable  one threedigit number wins $600 and all others win nothing  that gamblers never reach "the long run." Even after many bets, their average ...

The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable  one threedigit number wins $600 and all others win nothing  that gamblers never reach "the long run." Even after many bets, their average ...


The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable  one threedigit number wins $600 and all others win nothing  that gamblers never reach "the long run." Even after many bets, their average ...

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.) I don't ...

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.) I don't ...

In 2002, the average price of new homes in a certain suburb was $145,000. Assume that this mean is based on a random sample of 1000 new home sales and that the sample standard deviation is $24,000. Construct a 95% confidence interval for the 2002 mean price of all such homes

The best way to buy a car. In the first place, people enjoy the companionship of car. Cars can be helpful in many ways. The best thing they are good for is going places. It is good to know that you have your own car. Owning your own car means not having to call someone for a ...

The best way to buy a car. In the first place, people enjoy the companionship of car. Cars can be helpful in many ways. The best thing they are good for is going places. It is good to know that you have your own car. Owning your own car means not having to call someone for a ...

The average mass of a man in an office is 85 kg with standard deviation 12 kg. The average mass of a woman in the office is 68 kg with standard deviation 8 kg. The empty lift has a mass of 500 kg. What is the expectation and standard deviation of the total mass of the lift ...

The salaries at a corporation are normally distributed with an average salary of $29,000 and a standard deviation of $4,000. Sixteen percent of the employees make more than Sara. What is Sara's salary? Round your answer to the nearest dollar.

1Suppose that the fuel comsumption of cars for the same model is normally distributed. A random sample of ten new cars of the same model are randomly selected and their fuel consumption (l/100 km) is determined by subjecting them to a road test of 500 km. Their mean fuel ...

In a survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation of 3.03. Given that Normally distributed populations have a first quartile of Z=0.67 and a third quartile of Z=.67, what does this suggest about whether or not these guesses are ...


A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of that survey.) The ...

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of that survey.) The ...

Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 55 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean ì = 55 ...

A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000. Pilot studies suggest that the population standard deviation is $70,000. Estimate the minimum sample size needed to estimate the ...

A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000. Pilot studies suggest that the population standard deviation is $70,000. Estimate the minimum sample size needed to estimate the ...

It is well known that the heights of individual American men are normally distributed with mean 70 inches and standard deviation 2.8 inches. The Central Limit Theorem states that if n men are randomly chosen, then their average height will also be normally distributed with ...

It is known that the population mean for the Quantitative section of the GRE is 500, with a standard deviation of 100. In 2006, a sample of 400 students taking the GRE, whose family income was between $70,000 and $80,000, had a quantitative GRE score of 511. Perform a one...

The average price for new mobile homes is known to be distributed with a standard deviation of 350. if a random rample of 49 homes resulted in a sample mean of 38500, obtain a 90% confidence interval on the population mean.

I am trying to understand the math part of supply and demand . I am not getting it,I really need help! The question is: The demand and supply functions for sweatshirts are as follows: DEMAND Supply Quanity Quanity demanded(per period) supplied(/peri price__ price 1015,000...

A study found that citizens spend on average $1950 per year on groceries with a standard deviation of $100. Assume that the variable is normally distributed. 5. Identify the population mean. 6. Identify the population standard deviation. 7. Find the probability that a sample ...


Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a headon collision. The essential safety benefit of crumple zones results ...

Assume that the average annual salary for a worker in the United States is 300,000 and that the annual salaries For Americans are normally distributed with a standard deviation equal to $7,000. Find the following: A. What percentage of Americans earn below $22,000? B. What ...

Assume that the average annual salary for a worker in the United States is $32,000 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Find the following: (A) What percentage of Americans earn below $24,000? (B) What ...

A traffic engineer plans to estimate the average number of cars that pass through an intersection each day. Based on previous studies the standard deviation is believed to be 52 cars. She wants to estimate the mean to within ± 10 cars with 90 percent confidence. The needed ...

1200 high school freshman were randomly selected for a national survey. Among survey participants, the mean gradepoint average was 2.8, and standard deviation was 0.6. What is the margin of error, assuming a 95% confidence level?

If fixed costs are $240,000, the unit selling price is $32, and the unit variable costs are $20, what are the old and new breakeven sales (units) if the unit selling price increases by $4? a. 12,000 units and 15,000 units b. 7,500 units and 6,667 units c. 20,000 units and 30,...

Write a short survey (8 to 10 questions) that is related to careers in general, careers in IT, or another occupational topic. Remember, this survey should somehow relate to your final project . Distribute this survey to at least four relatives and/or friends who are at least ...

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: Price Quantity $ 6,000 5,500 5,000 6,500 4,000 7,500 3,000 8,500 2,000 9...

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: Price Quantity $ 6,000 5,500 5,000 6,500 4,000 7,500 3,000 8,500 2,000 9...

Studies shown that gasoline use or compact cars sold in the U.S. is normally distributed, with a mean of 25.5 mpg and standard deviation of 4.5 mpg. Find the range of mileage for the middle 60% of compact cars.


E 511 Income (loss) recognition; percentageofcompletion and completed contract methods compared LO4 Brady Construction Company contracted to build an apartment complex for a price of $5,000,000. Construction began in 2006 and was completed in 2008. The following are a ...

it costs $20 to replace an air filter on a $20,000 car, ehat percent of the cars value is the price of the air filter?

A startup company can sell 1000 computers if they price them at $500. The number sold will increase by 10 for every $1 decrease in the price. The company has fixed costs of $100,000, and each computer costs 4300 To produce. find the price that will maximize the company's ...

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: Price Quantity $ 6,000 5,500 5,000 6,500 4,000 7,500 3,000 8,500 2,000 9...

Studies shown that gasoline use or compact cars sold in the U.S. is normally distributed, with a mean of 25.5 mpg and standard deviation of 4.5 mpg. Find the range of mileage for the middle 60% of compact cars. I have no idea how to do this with the percent.
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