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In a random sample of patient records in Cutter Memorial Hospital, six-month postoperative exams were given in 90 out of 200 prostatectomy patients, while in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the p-value is?
A box contains ten fuses of which 3 are defective. Two fuses are selected at random from the box without replacement. What is the probability that exactly one of the fuses selected is defective?
A human factors psychologist studied three computer keyboard designs.
A yearbook page is to be designed so that there are 24 square inches available for print or pictures with margins of 1.5 inches on the top and bottom
In a standard normal dist. what is the prob. of getting a value less than 1.63? How about between 1.13 and 1.86? How about greater than .58?
Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
How large a sample is needed to find the population mean within $250 at 99 percent confidence?
A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Determine the margin of error in estimating the population mean. Sample of 68 college students yields a mean annual income of $3248. Assuming that the standard deviation = $885.
On a particular day during the most recent golf tournament, the organizer placed the whole (pin) in 0 back left corner of the green. 64 golfers played the hole with the new placement on that day. Find out the probability of the sample average numb..
Suppose a t- test is being applied to find out if the population monthly expenditure mean is less than $212. The level of significance selected is 1% and 26 accounts are sampled. What is the critical value?
The Dept. of Labor has reported that 30% of the 2.1 million mathematical and computer scientists in the United States are women. If 3 individuals are randomly selected from this occupational group
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