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A taxi company in a small town has two cabs. Cab A stalls at a red light 25% of the time, while cab B stalls just 10% of the time.
A driver randomly selects one of the cars for the first trip of the day. What is the probability that the engine will stall at the first red light the driver encounters?
A data set of ordered pairs with a negative linear correlation has a coefficient of determination of 85.2%. What is the linear correlation coefficient?
The owner of a local night club has recently surveyed a random sample of n=250 customers of the club. She would now like to determine whether or not the mean age of her customers is over 30.
the following probability model shows the distribution of doctoral degrees from u.s. universities in 2009 by area of
games are built around random number generators. given any circumstance there is always a defined set of possible
What is the arithmetic mean income? What is the population variance? The standard deviation? The annual incomes of officers of another firm similar to TMV Industries were also studied.
A total of 61,647 people responded to an Elle/ MSNBC.com survey. It was reported that 50% of the respondents were women and 50% men.
Analyze whether or not patients undergoing this treatment are illustrating significant change from baseline to 3 months afterward. Report a p-value.
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint, was there a "type" error made? If yes, which type? Explain.
Median score of 67. Based on this information, the distribution of test scores is symmetric, left skewed, right skewed, or bimodal?
A sample of 100 bugs yields an average weight of 3.6 ounces. Assuming that the population standard deviation is 0.6 ounces, find the margin of error in estimating μ (the true mean weight of all bugs of this type) at the 90 % level of confidence.
Sixty percent of the families in a certain community own their own car, thirty percent own their own homes, and twenty percent own both their own home and own car. If a family in the community is randomly chosen, what is the probability that they ..
The marks on a statistics midterm test are normally distributed with a mean of 78 and a standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is more than 75?
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