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For evaluation purposes, Megan needs to determine how many students she has to survey to estimate the proportion satisfied with attendance in her tennis program. There are about 1,250 students in her target population. Since no surveys have been previously done, she has no idea as to what proportion will score the program high. She is comfortable with being able to estimate the proportion within plus or minus 5% with a 95% confidence level. How many tennis club members do you recommend that she survey? Would that number change if after gathering some information she estimates that about 80% are satisfied?
A social worker has been assigned to assess the effectiveness of the afterschool program in reducing juvenile violence rate (JVR) in her community.
the following probabilities for grades in management science have been determined based on past
a student must answer 43 or more questions correctly to obtain a grade of a. what percentage of the students who have
the bullish sentiment was reported to be 48.7 oneweek earlier and 39.7 one month earlier. the sentiment measures are
Physical Sciences Tinted residential windows have become popular because they help a home absorb solar energy, keep out harmful ultraviolet rays.
what proportion of the following sample of ten measurements lies within 2 standard deviation of the mean?1 5 9 2 63 3 4
Determine all possible genotypes of the offspring of these parents:
Given 5,000 light bulbs from an outside supplier. If past performance data indicates that these have been 3% defective, and a random sample of 40 parts are drawn from the shipment what is the probability that you will find more than 2 defective pa..
A random sample of 28 executives gives x = 6.7 years and s = 2.4 years. Give a 99% con?dence interval for the average number of years of experience for all executives in this branch.
Using a previous exercise about Hallux abducto valgus (HAV) (deformation of the big toe that often requires surgery). Doctors used x-rays to measure the angle (in degrees) of deformity in 38 consecutive patients under the age 21 who came to a medi..
A serious disease is known to have a fatality rate of 80%. In a clinical study of a new treatment for this disease, 90 of 120 patients died.
Suppose that n items are being tested simultaneously; that the items are independent; and that the length of Life of each item has an exponential distribution.
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