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1. The Internet. Find an Internet source that reports on a study and describes the data. Print out the description and answer the questions above.
2. Bicycle safety. Ian Walker, a psychologist at the University of Bath, wondered whether drivers treat bicycle riders differently when they wear helmets. He rigged his bicycle with an ultrasonic sensor that could measure how close each car was that passed him. He then rode on alternating days with and without a helmet. Out of 2500 cars passing him, he found that when he wore his helmet, motorists passed 3.35 inches closer to him, on average, than when his head was bare.
Benz-Merc Cars produces four classes of cars: subcompact, compact, intermediate and luxury. BM also produces trucks and vans. Vendor capacities limit total production capacity to at most 1.2 million vehicles per year.
at a publishing company the mean age of proofreaders is 36 years old and standard deviation is 4 years. assume the
a machine that produces a major part for an airplane engine is monitored closely. in the past 10 of the parts produced
Find the mean sample to be 24.7 years. With a standard deviation of 3 years. Is there evidence to support the claim at C,V= -1.70 find the P value
overproduction of uric acid in the body can be an indication of cell breakdown. this may be an advance indication of
A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthfull..
Assume the probability that a person has the desease is 0.08 for all people, independently of each other. Compute the total expected number of tests necessary.
A researcher obtains t = 4.00 and MD = 9 for a repeated-measures study. If the researcher measures effect size using the percentage of variance accounted for, what value will be obtained for r2?
What is the probability that the survey will show a greater percentage of Republican voters in the second state than in the first state?
The manufacturer wanted to determine if the tires were exceeding the guarantee. At the .05 significant level, it was concluded that the tires are exceeding the manufacturer's guarantee.
1 assume that adults have iq scores that are normally distributed with a mean of 105 and a standard deviation of 15.
An individual has put in a request for a single license. Use simulation to approximate the probability that the request will be granted. Perform at least 20 simulated lotteries (more is better!). Do you think that this is a fair way of distributing..
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