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among 28 professors of a certain department,18 drive foreign cars and 10 drive domestic cars.If 5 of these professors are selected at random what is the probability that atleast 3 of them drive fore
Assume that, the standard deviation of a monthly rents paid by students in a particular town is $40 A random sample of 100 students was taken to estimate the mean monthly rent paid by the whole stu
Weekly demands at a grocery store for a brand of breakfast cereal is normally distributed with a mean 800 boxes and a standard deviation of 75 boxes. less than 650 boxes or greater than 950 boxes?
A restaurant has three sources of revenue: eat-in orders, takeout orders, and the bar. The daily revenue from each source is normally distributed with mean and standard deviation shown in the table
The average starting salary of an MBA degree holder from a certain university is Rs.10000 per month with a standard deviation of Rs. 1000. assuming the starting salaries follow a normal distribution
Write the mathematical model and determine the probability that None of the dish owners in the sample subscribe subscribes to at least one premium movie channel?
Average undergraduate cost for tuition, fees, room and board for all institutions in 2007 was $19,410. A random sample of costs in 2008 for 40 institutions indicated that the sample mean was $22,098
A state meat inspector in Iowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled "3 pounds." Of course. He realizes that the weights cannot be preci
He realizes that the weights cannot be precisely 3 pounds. A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pounds. A. What is the estimated
The garages with open doors will have something stolen, but only 1 percent of those closed will have something stolen. If a garage is robbed, what is the probability the doors were left open?
I. What score was earned by more students than any other score? Why? II. What was the highest score earned on the exam?
Llevels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. How many of the people in the sample had glucose levels above 119?
Predict the number of accidents per year (to the nearest whole number) for a person whose age is 45 and who works 42 hours per week.
class consists of 55% women, and 45% men 10% of the women smoke and 20% of the men smoke, what is the probability that a randomly selected smoker is female?
You can allow the cup to overfill 10% of the time. What amount should you set as the mean amount of coffee to be dispensed?
The Graduate Record Examinations are widely used to help predict the performance of applicants to graduate schools. The range of possible scores on a GRE is 200 to 900.
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 200 of its alumni. The mean annual income was $52,500 with a standard deviation of $1,800. Find a 9
Records show that the probability of seeing a hawk migrating on a day in September is about 35%. What is the minimal number of days a person must watch to be at least 96.8% sure of seeing one or mo
A shipment of 580 fasteners that contains 12 defective fasteners was sent to a manufacturing plant. What is the probability that no defective fasteners are found during the inspection?
A dance class consists of 22 students of which, 10 are women and 12 are men. If 5 men and 5 women are to be chosen randomly and then paired off, what is the probability of a given pair (Alice-Bob) t
A lottery consists of drawing 8 balls without replacement from an urn containing balls numbered from 1 to 33. What is the probability that a randomly selected lottery ticket will win mone.
annual per capita consumption of milk is 21.6 gallons. being from the midwest, you believe milk consumption is higher there and wish to support your opinion. a sample of 16 individuals showed a mean
The wall thickness of 25 glass 2-liter bottles was measured by a quality-control engineer. The sample mean was x=4.05 mm, and the sample standard deviation was s= 0.08 mm. Find a 95% lower confiden
This sample of 36 has a mean value of ?, which belongs to a sampling distribution. Find the shape of this sampling distribution.
What is the probability you will have 20 or less flights that are late ? What is the probability you will have more than 100 on time ?