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An independent company found that 20% of waiting times at a fast food restaurant were longer than 5 minutes. If 220 customers were served, what is the probability that less than 30 customers experienced waiting times in excess of 5 minutes?
a. What is the interpretation of independence of two events? b. How can you tell whether two events are independent or not?
Volcanoes. Almost every year, there is some incidence of volcanic activity on the island of Japan. In 2005 there were 5 volcanic episodes.
An employer is involved in a lawsuit concerning work discrimination.- Does it appear that the employer favors some ethnicities over others when considering candidates for promotion?
The director of graduate admissions at a large university is analyzing the relationship between scores on the math portion of the Graduate Record Examination.
the distribution of the sum of 100 independent identically distributed random variables isa. approximately normalb.
What is the purpose of conducting an experiment? How does an experimental design accomplish its purpose? In an educational study, what are the advantages and disadvantages of an experimental design?
41% of the doctors in America are dentists. If a random sample of size 826 is selected, what is the probability that the proportion of doctors
Make a forecast for 2005, using a trend model of your choice or a judgment forecast. Discuss. Note: Time increments are 5 years, so use t = 6 for your 2005 forecast.
Find the margin of error for this poll if we want 95% confidence in our estimate of the percent of American adults who approve of cloning humans.
What is the probability that both the Team A and Team B will win this weekend? What is the probability that only one of the two teams will win this weekend?
Sometimes data is easy to collect, at other times it may not be as easy. Sometimes in the real world the number of things/people we want to collect data from or about are so huge and we have to make decisions on how this can be done in as reliable a ..
What is the difference between standard normal distribution curve and normal distribution curve
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