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A marketing firm is interested in determining whether there is an association between education levels and time spent watching television. The firm surveys 1oo people and finds that 40 have high school qualifications and of these 25 watch more than 15 hours per week of TV. 10 watch between 10 and 15 hours per week of TV and 5 watch less than 10 hrs per week of TV. The firm finds 20 individuals who have undergraduate qualification and of these 10 watch more than 15 hrs per week, 5 watch between 10 and 15 hours per week and watch less than 15 hrs per week, 15 watch between 10 and 15 hrs per week and 10 watch less than 10 hrs per week. Determine whether there is a relationship between education levels and hours spent watching TV.
What is the predicted GPA if a person watches 12 hours of television per week?
Assume that the mean SAT score in Mathematics for 11th graders across the nation is 500, and that the standard deviation is 100 points. Find the probability that the mean SAT score for a randomly selected group of 150 11th graders is between 475 a..
Using this test 80% of Down's syndrome cases can be identified at birth, while 5% of normals are detected as positive. a. What is the sensitivity and specificity of the test?
When writing about the probability that it will rain in Boston on July 4 of next year, a newspaper reporter states that the probability is ½, because either it will rain or it will not.
What is the value of the population mean? What is the best estimate of this value? Explain why we need to use the t distribution. What assumption do you need to make?
Construct a relative frequency distribution for the weights of regular Coke by starting the first class at 0.7900 lb. and use a class width of 0.0050 lb.
If a new graduate is given a bunch of flowers from this outlet, what is the probability that the flowers were purchased by their partner or friend?
A store has an average of 25 people arriving each minute to checkout and each person on the average require 4 minutes to be processed at the checkout. What is the minimum number of cashiers required?
Find out the probability distribution of your net winnings if you play one time. Calculate the mean and the standard deviation.
The kinds of statistical methods that were used to formulate the author's argument.
Determine the probability that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?
There are three types of bread, three types of meat, three types of cheese, and four types of topping. How many different sandwiches can the restaurant make?
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