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A random telephone survey asked 208 drivers if they run red lights. Of the 48 drivers who were 35 years old or younger, 32 admitted that they run red lights. Eighty-six of the 160 drivers that were older than 35 years old admitted to running red lights. At the 0.01 level of significance, test the claim that the percent of drivers who are 35 years old or younger and who run red lights is higher than the percent of drivers who are older than 35 years old and who run red lights.
A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. Determine the standard deviation. Compute the coefficient of variation.
a family has 8 children .they wants to take a photo of them sitting in a single line. in how many different ways can
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
using an a 0.04 a confidence interval for a population proportion is determined to be 0.65 to 0.75. if the level of
this years dream of a lifetime lottery sold 50000 tickets and gave away 5000 prizes including one grand prize. what is
A 90% confidence interval for the mean Math SAT score mu for the population of seniors is what? (Assume the population of Math SAT scores for seniors in the district is approximately normally distributed.
Explain how you can determine n3 from knowing n1 and n2. Thus, the multinomial distribution of (n1, n2, n3) is actually two-dimensional.
a simple random sample of 120 clocks yields nine clocks with errors in assembly.a. compute the 99 confidence interval
Explain the overall statistical significance of the model, Explain the statistical significance for each independent variable in the model
A high of 10 was possible. A sample of five tests was selected from each group. The test grade results were: At the 0.01 level, what is the critical value?
What is the probability that a home has a garage but not a swimming pool?
The mean number of flaws per 100 m of material produced on a certain machine at Blanktown Fabrics is 2. If flaws occur randomly, find the probability that in 50 m of material there will be less than 2 flaws.
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