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If Smith checks 300 of the 7500 welds completed that shift, what is the probability that he will find fewer than 20 substandard welds?
Suppose that $98,000 is to be allocated for advertising, research, and investment in the ratio 8:4:2. How much money will be allocated for each?
The mean mathematics SAT score was 515, and the standard deviation was 116. The SAT scores were normally distributed. Suppose that a group of 48 students who took the SAT was chosen. If you wanted t
Find the probability that at least 8 of them started smoking before 18 years of age. According to the Information Please Almanac. 80% of adult smokers started smoking before turning 18 years o
The reinvestment rate for these funds is 3 percent. Anderson uses an 13 percent required return on this project. what is the NPV?
A recent article in a university newspaper claimed that the proportion of students who commute more than 15 miles to school is no more than 25%. Suppose we want to test the hypothesis. State hypoth
A normal random variable with a mean of $45.16 and a standard deviation of $10.00. Find the probability that a household spentless than $25.00.
If a worker is known to strongly agree with the statement "My current job brings out my most creative ideas," what is the probability that the worker is engaged?
When the husband is not shopping, 30% of the time the wife is shopping. Find the probability that: If the wife is shopping, the husband is also shopping.
Historical data for a local steel manufacturing company shows that the average number of defects per standard sheet of steel is 2. In addition, the number of defects per unit is distributed accordi
The manager of the local grocery store has determined that, on the average, 4 customers use the service desk every half-hour. Assume that the number of customers using the service desk has a Poisso
On the basis of these data, can the college conclude that the students in the new program performed significantly better than the rest of the freshmen class? Use a one tailed test with σ=.05.
An advertising campaign is being developed to promote a new bookstore opening in the newest mall development. To develop an appropriate mailing list it has been decided to purchase lists of credit c
Uniform distribution over the interval 6.5 to 8.5 millimeters. What is the probability that a randomly selected ball bearing has a diameter greater than 7.4 milliliters?
At a certain university, 30% of the students major in zoology. Of the students majoring in zoology, 60% are males. Of all the students at the university, 70% are males. What percentage of the stude
When rain is forecast, Mr. Pickwick takes his umbrella. When rain is not forecast, he takes it with probability 1/3. Find the probability that Pickwick has no umbrella, given that it rains.
A sample of 3 is taken from a population of 12 engines.5 of which are built to metric standards and 7 of which are built to english standards. what is the probability that out of 3 taken,at least o
75% of students live in dormitories. A random sample of 5 students is selected. Using the binomial probability tables, find the probability that none of the students lives in the dormitories?
From several yars of sales records, store management has determined that a week demand for some items has a normal distribution with the mean of 563 units, and the standard deviation of 112 units..
Suppose a customer tries to access the internet on four different occasions, which are sufficiently spaced apart in time, so that we may assume that the states of the system corresponding to these f
What is the mean of the sampling distribution of, the proportion of adults in samples of 500 who favor giving parents of school-age children these vouchers?
An average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 and 6 cups?
In a normal distribution, such as in this example, you can define a probability value for every score. Define probability value in your own words. How is a probability value of .05 in this example r
There are 50 industrial firms. An inspector will visit 10 randomly selected to check for violations of regulations. If 15 of the firms are actually violating at least one regulaltion, what is the p
Jolly Blue Giant Health Insurance (JBGHI) is concerned about rising lab test costs and would like to know what proportion of the positive lab tests for prostate cancer are actually proven correct th