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Incorporate this information into a decision-making process to decide whether the waste-management company should proceed with the recycling venture.
It is known from previous studies that the population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the dual degree students are receiving lowe
The teacher selects 10 students at random to check for completion of today's paper. If X denotes the number of papers belonging to seniors among those checked, will X have a binomial distributuin?
Customers were waiting in line too long so data was collected. The mean time was 28 minutes. One month later a sample of 127 customers was selected. The mean wait time recorded was 26.9 minutes and
If a sample of 30 people selected from 300, find the probability that the mean will be less than 156 pounds using the correction factor.
a survey of 791 vacationers from the United States found that they planned on spending at least $2000 for their next vacation. Identify the population and the sample.
Sociology-Ethics. The one-time fling! Have you ever purchased an article of clothing (dress, sports, jackets, etc.) worn the item once to a party, then returned the purchase? This is called the one
The lifetime of a certain brand of tire has a mean of 43,000 miles and a standard deviation of 6,000 miles. The lifetime distribution closely follows a normal distribution. What proportion of tires
Only 22% of ameicans are happy with their wieght. In a random sample of 100, what is the probablity of the sample proportion exceeding .25?
The average number of punds of meat that a erson consumes a year is 214.7 pounds. Assume that the standard deciation is 20 pounds and the distribution is approximately normal. Find the probability,
What is the probability that the average of the scores of the two students from university A will be greater than average of the scores of the three students from University B?
The service time in queues should not have a large variance; otherwise, the queue tends to build up. A bank regularly checks service time by its tellers to determine its variance. A random sample of
Develop and conduct a statistical test to evaluate whether model output is consistent with system behavior. Use the level of significance α=0.05.
The manufacturer of batteries used in small electric appliances wants to estimate the average life of a battery. A random sample of 12 batteries yields X-bar = 34.2 hours and s = 5.9 hours. Give a 9
A recent study by the Greater Los Angeles Taxi Drivers Association showed that the mean fare charged for service from Hermosa Beach to the Los Angeles International Airport is $18.00 and the standar
In 1995, 84.6% of the labor force was white. Of the whites in the labor force, 95.1% were employed. Among non-white members of the labor force, 91.9% were employed.
Give a 99% confidence interval for the rating of the table that would be given by an average member of the population of regular customers. Assume normality.
What was the cost for the 10 percent of employees who incurred the highest dental expense?
Find the probability that the face showing up a six turns up between 10 and 30 times. Find the probability that the sum of the face values of the 100 trials is less than 250.
the CPU time requirement of a typical program measured in minutes is found to follow a gamma distribution with parameters a=3 and b=2. what is the probability that CPU demand of a program will excee
Let the random variable X be the number of hats returned to their rightful owners. Compute the expected value of X , the variance of X and the standard deviation of X .
You are working on an analysis of your company's current cost structure reviewing the various fixed and variable costs within your firm. Your objective is to maximize your firm's profit. In reviewin
in a homicide case 4 different witnesses picked the same man from a line up. the line up contained 5 men. if the identifications were made by ramdom guesses, find the probability that all witnesses
Calcium levels in people are normally distributed with a mean of mg/dL and a standard deviation of mg/dL. Individuals with calcium levels in the bottom of the population are considered to have low c