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A company has installed five intrusion-detection devices in an office building. The devices are very sensitive and, on any given night, each one has a 0.1 probability of mistakenly sounding an alarm when no intruder is present.
If two or more of the devices are activated on the same night, the intrusion system automatically sends a signal to the local police.
If no intruder is present on a given night, what is the probability that the system will make the mistake of calling the police?
balls are drawn one at a time from an urn containing 50 balls numbered from 1 to 50. the ball is kept if it is numbered
a) Find the probability that the person is frequently or occasionally involved B) Find the probability that the person is female or not involved in charity work at all c) Find the probability that the person is male or frequently involved in charity ..
question 1 a sample of 2000 licensed drivers revealed the following number of speeding violations.number of
Calculate the standard deviation of BMI. Calculate the median BMI. The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes.
sales 2363 2.1 advertising - 279 price - 136 unemplpyment r2 .76units of measurement sales is in product units
records indicate that on average 3.2 breakdowns per day occur on an urban highway during the morning rush hour.
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
A sample of scores on an examination given to both males and females is: At the .01 level of significance, is the mean grade of the female students higher than that of the males?
Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0.
Do not forget to test for any applicable difference in means (Tukey implies).
Computer stocks currently provide an expected rate of return of 16%. Dell, a large computer company, will pay a year-end dividend of $2 per share.
Suppose that you want to disprove this claim, believing the actual average is lower, and your random sample of 15 months revealed a sample mean of 2.1 million visits and a standard deviation of 1.2 million. Conduct the test using α = 0.05. What is..
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