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An anthropologist wishes to estimate the average height of men for a certain race of people. If the population standard deviation is assumed to be 2.5 inches and if she randomly samples 100 men
The probability of "more than 20 defective items" corresponds to the area of the normal curve described with this answer: "the area to the right of 20.5."
If np is greater than or equal to 5 and nq is greater than or equal to 5, estimate the indicated probability by using the normal distribution as an approximation to the binomial.
You know that the population mean for 25,000 homepage download times for a certain web site is 2.5 seconds with a standard deviation of 0.5 seconds. (You can assume the population distribution is be
Assume 40% of us have Group O blood. A hospital is conducting a blood drive because its supply of Group O blood is low, and it needs at least 211 donors of Group O blood. If 476 volunteers donate bl
In a study conducted for the State Department of Education, 30% of the teachers who left teaching did so because they were laid off. Assume that we randomly select 12 teachers who have recently left
In a survey of 1224 people, 837 people said they voted in a recent presidential election. Voting records show that 66% of eligible voters actually did vote. Given that 66% of eligible voters actuall
Suppose the prevalence of a disease is 2 per thousand people. A screening test has a specificity of 95% and a sensitivity of 99%. Describe each of the probabilities.
A company issues credit cards and uses software to detect fraud. After tracking the spending habits of one consumer, it was found that charges over $100 constitute 30.2% of the credit transactions.
An aircraft has 212 seats. When someone buys a ticket for a flight, there is a 0.0591 probability that the person will not show up for the flight. A ticket agent accepts 217 reservations for a fligh
A friend of mine is giving a dinner party. His current wine supply includes 11 bottles of zinfandel, 10 of merlot, and 9 of cabernet (he only drinks red wine), all from different wineries. If he wa
Which of the following is NOT commonly regarded as being a credit policy variable?
Other things held constant, which of the following would tend to reduce the cash conversion cycle?
Which of the following items should a company report directly in its monthly cash budget?
Which of the following is NOT a situation that might lead a firm to increase its holdings of short-term marketable securities?
Please answer the following questions with citing where necessary. Give the formal definition of the central limit theorem
Singal Inc. is preparing its cash budget. It expects to have sales of $30,000 in January, $35,000 in February, and $35,000 in March. If 20% of sales are for cash, 40% are credit sales paid in the mo
Pat likes to fish in a lake inside the Arctic Circle that has trout and pike. In any given day, the probability that Pat catches trout is 0.5, and the probability that he catches pike is 0.6. Find t
What are advantages to using the p-value method as opposed to the critical point (or rejection point) method?
To answer the question input only the actual number. Do not include units. Do not give your answer in sentence form -- just include the numerical answer rounded to exactly 4 decimal places.
Explain why the sum of x-xbar (mean)=0. Explain how this is related to the property of the mean that states that the mean is the balance point of its distribution.
Imagine you are planning a pizza party for the little league team and need to feed 12 people: 8 children and 4 adults. Develop and explain a mathematical formula you could use to determine cost and
A committee is evaluating six equally qualified candidates for a job. Only three of the six will be invited for an interview; among the chosen three, the order of invitation is of importance because
Imagine that the correlation between the number of hours a child watches tv in a week and his/her score on a common measure of sustained attention (The CPT - Continuous Performance Test) is - .48. T