A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 138.7 seconds. Assuming drive-through times are normally distributed with a standard deviation of 31 seconds, complete par (a) through (d) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 103 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 103 seconds is (Round to four decimal places as needed.)

Q: High school students across the nation compete in a financial capability challenge each year by…

A: Top 12 percent are recognized publicly for their achievement by the Department of Treasury.

Q: An economics professor decides to curve the grades of his class. In doing so, he decides to make it…

A: Given data: An economics professor decides to curve the grades of his class. In doing so, he decides…

Q: The annual per capita consumption of bottled water was 33.3 gallons. Assume that the per capita…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: On a statistics exam, the mean score was 80 and there was a standard deviation of 7. If a student's…

A: Given data, μ=80σ=7If x=92z=?

Q: In a fishing contest, the length of the fish caught ranging from 11.5 inches to 23 inches with a…

A: From the given information, the mean length is 16.40 inches and standard deviation is 4.71 inches.…

Q: The mean rate for cable t.v.from a sample of 80 households was $29 per month with a standard…

A:

Q: A bank's loan officer rates applicants for credit. The rating are normally distributed with a mean…

A: From the given information,   Mean = 705 Standard deviation = 32 Sample size = 50

Q: top 19 percent are

A: Given that  High school students across the nation complete in a financial capability challenge each…

Q: The Monthly salaries of teachers at Los Angeles Trade Tech are normally distributed with a mean of…

A: Given information: The monthly salaries of teachers at Los Angeles Trade Tech are normally…

Q: What proportion of skiers will finish the race in exactly one minute?

A: The tume it takes for downhill skiers to finish a race follows a Normal distribution with a mean of…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: Assume that adults have IQ scores that are normally distributed with a mean of 95.9 and a standard…

A: Given: Mean μ = 95.9 Standard deviation σ = 15.6 Formula Used: Z-score: Z = X-μσ

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Given that, A set of final examination grades in an introductory statistics course is normally​…

Q: A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from…

A:

Q: The daily sales of a small retail store in Toronto for the last 365 days are normally distributed…

A:

Q: According to government data, the probability that a woman between the ages of 25 and 29 was never…

A:

Q: A normal distribution is observed from the body weights of the forty students in a class. If the…

A: Given information Mean (µ) = 125 Standard deviation(σ) = 9 As per empirical Rule 68% falls within…

Q: he average number of minutes per week that teenagers spend texting is 240.0 . Assume the standard…

A: Given data, μ=240σ=72If n=64P(230<X<250)=?

Q: Assume that the hourly cost to operate a commercial airplane follows the normal distribution with a…

A: Consider X be a random variable which follows normal distribution indicates the operating cost of a…

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: If the normal operating life of a car is considered to be 150,000 miles, with a standard deviation…

A: The probability that a car will last 200,000 miles is calculated as follows:

Q: A recent survey found that 61% of all adults over the age of fifty wear glasses for driving. In a…

A: Given that Given distribution is binomial. n=Random sample of 80 adult n=80 p=61% of adults over the…

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: The playing life of a Sunshine radio has a Normal distribution with a mean of 600 hours and a…

A: The playing life of a radio is normally distributed with mean 600 hours and standard deviation of…

Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…

A: Formula : Mean = np Standard Deviation  :

Q: Assume that the heights of men are normally distributed with a mean of 69.5 inches and a standard…

A: It is given that  Mean, μ = 69.5 Standard deviation, σ = 2.1 Sample size, n = 36

Q: The average drive to work is 9.6 miles. Assume the standard deviation is 1.8 miles. If a random…

A: From the given information, x¯=9.6σ=1.8n=36

Q: The annual per capita consumption of bottled water was 33.3 gallons. Assume that the per capita…

A: Given information- Population mean, µ = 33.3 gallons Population standard deviation, σ = 12 gallons…

Q: bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of…

A: