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In a winter of an epidemic flu, 2000 babies were surveyed by a well-known pharmaceutical company to determine if the company's new medicine was effective after two days. Among 120 babies who had the flu and were given the medicine, 29 were cured within two days. Among 280 babies who had the flu but were not given the medicine, 56 were cured within two days. Is there any significant indication that supports the company's claim of the effectiveness of the medicine?
q1. an investigator hypothesizes that cholesterol level in children might be affected by educating their
Is this a statistically significant difference? Write the two statistical hypothesis and conduct the appropriate test with your conclusion justified.
a batch of 20 used automobile alternators contains 4 defectives. if 3 alternators are sampled at random find the
If the airline books 76 people on a flight for which the maximum number is 74, what is the probability that the number of people who show up will exceed the capacity of the plane?
Solve using the square root property: Radicands must be enclosed within
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less. To test this, he displayed the signs every ..
The number of defects per foot Y is assumed to have a Poisson distribution with mean = 2. i) What is the probability of observing 3 defects in 4 feet of wire?
A local computer sales office sent the following information about the computer system installation. Identify the critical path by computing the ET, LT, TS and FS values.
Misses the dart board with probability 0:02, what is the probability that seven throws will result in no bull's-eyes, no triples, a double twice, and a complete miss once?
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
In a study designed to determine patientâ??s acceptance of a new pain reliever, 100 physicians each selected a sample of 25 patients to participate in the study.
question the associated press reports that the mean trading volume for equity and index options contracts was 3.6
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