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In 2001, Progressive Insurance asked customers who had been involved in auto accidents how far they were from home when the accident happened. The data are summarized in the table.
Miles from Home
% of Accidents
Less than 1
23
1 to 5
29
6 to 10
17
11 to 15
8
16 to 20
6
Over 20
a) Create an appropriate graph of these data.
b) Do these data indicate that driving near home is particularly dangerous? Explain.
A researcher selected a sample of 50 residents from each of three different cities to determine if they were willing to participate in a medical experiment. At a = .05, test the claim that the proportions who will participate are equal.
Dana and Cathy are playing tennis. The probability that Dana wins at least one out of two ames is 0.3. What is the probability that Dana wins at least one out of four?
An experiment is conducted comparing the effectiveness of a new method of teaching algebra for eighth-grade students. Twelve gifted and 12 regular students are taught using this method. Their scores on a ?nal exam are shown in the following table.
Discuss how validity and reliability will be achieved. Explain how the data will be physically collected. Explain where data will be stored and how it will be protected.
consider the hypothesis test given byh0 mu 530h1 mu ne 530in a random sample of 85 subjects the sample mean is found
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