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Refer to the previous exercise.(a) If two ringtones are selected independently, what is the probability that both are Party in the USA?
(b) Describe in words the complement of the event described in part (a) of this exercise. Find the probability of this event.
Exercise Ringtones. What are the popular ringtones? The Web site funtonia.com updates its list of top ringtones often. Here are probabilities for the top 10 ringtones listed by the site recently
(a) What is the probability that a randomly selected ringtone from this list is either Empire State of Mind or I Gotta Feeling?
(b) What is the probability that a randomly selected ringtone from this list is not Empire State of Mind and not I Gotta Feeling? Be sure to show how you computed this answer.
If we assume a normal distribution and a standard deviation of , what proportion of passenger trips produced a revenue of less than $1.05?
if ho b1 0 is not rejected what is the best estimate for the value of the response variable for any value of the
a random sample of 25 was drawn from a normal distribution with a standard deviation of 5. the sample size is 400.
Assume we know the length of time a battery will hold a charge is a normal distribution with a mean of 50 hours and a standard deviation of 15 hours.
In a shipment of 59 vials, only 18 does not have hairline cracks. 6 vials are randomly selected from the shipment. Find the probability that at least one of the 6 selected vials has a hairline crack.
Null Hypothesis (Ho): There is no significant difference between the population average scores of mathematics among these three groups with different teaching method.
A company with a fleet of 150 cars found that the emissions systems of 7 out of the 22 they tested failed to meet pollution control guidelines. Is this strong evidence that more than 20% of the fleet might be out of compliance?
Over the same period the average /maximum temperature in Dublin was 6.2 degrees Centigrade. The standard deviation was 2.9. How to compute the variance of temperature in Boston.
In a laboratory, scientists are performing chemical reactions. The amount of product formed by a reaction can be determined by the equation P= .25r, where P is the product and r is the amount of reactants used. Find out the constant of proportiona..
While in July the mean high temperature is 74oF and the standard deviation is 8oF. In which month is it more unusual to have a day with a high temperature of 55oF?
a simple random sample of 40 items resulted in a sample mean of 25. the population standard deviation is 5.a. what is
1. mention the characteristics of statistics. explain any two applications of statistics.2. distinguish between primary
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