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Otherwise the intensity parameter (accident rate) would not be constant over the entire time period. If the three assumptions hold, then the probability that there are accidents during a time interval of length will be given by (1), where is the average of expected number of accidents per unit time. Example 26.2 During the busy period from 4:00 to 6:00pm on weekdays, accidents occur along a stretch of highway at the average rate of 3 per hour. What is the probability that there will be more than 6 accidents in a 1-hour period? What is the probability that there will be at most 2 accidents during the 2-hour busy period on a particular day?
According to the Chebyshev rule, at least what percentage of the observation in any data set are contained within a distance of 3 standard deviations around the mean.
The weights of the contents of cereal boxes are normally distributed, with a mean weight of 12 ounces and a standard deviation of 0.05 ounce. The weights of four cereal boxes selected at random are 12.01 ounces, 11.92 ounces, 12.12 ounces, and 11...
Form the column of differences and find the mean and standard deviation of this column of numbers.
Canceled on the day of the flight is (1.2%,4.5%). What is the point estimate of the mean percentage of reservations canceled on the day of the flight?
A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special".
Then a second ball is drawn at random from the three ball in the box. what is the probability that the first ball drawn was white, given that at least one to the two balls drawn was white?
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
Let μ be the mean perceived age estimate for all viewers of the ad, and suppose we consider the industry requirement to be met if μ is at least 25. Set up the null and alternative hypotheses needed to attempt to show that the industry requirement ..
The given data show the age distribution of top 14 doctors in emergency faculty of local hospital.
To determine whether there exists mean difference among the groups:
Find the cumulative distribution function and the probability that any given defects occur between 1.5 miles and 2.5 miles along the stretch of road?
If 2 randomly chosen students are surveyed and both feel optimistic about their employment prospects, what is the probability that both were math students?
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