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The probability that a call received by a certain switchboard will be wrong number is 1 per 100 calls. Use poisson approximation to the binomial distribution to find the probability that among 120 calls recieved by the switchboard.
1. There are no wrong #'s2. Exactly 1 wrong #3. Exactly 2 wrong #'s4. Exactly 3 wrong #'s5. At most 3 wrong #'s
The analogous probability for the second signal is 0.49, and the probability that he must stop at at least one of the two signals is 0.75. What is the probability that he must stop
A function sometimes associated with a continuous nonnegative random variable is the failure rate (or hazard rate) function which is defined as:
What is the probability that the student is both a sophomore and a history major?
The calculated chi-square test statistic and the table value for a 0.05 significance level are:
Assuming that both patients are on time, find the expected amount of time that the 1:30 appointment spends in the doctor's office.
A bag contains 4 chips of which one is red, one is blue, one is green, and one is yellow. A chip is then selected at random from a bag and then replaced in the bag.
In other words, both variables have the same mean but different standard deviations. Draw rough sketches of the two normal curves on the same graph.
Range of 0 to 5 Volts. An environmental effect, such as a change in ambient temperature, lowers the sensitivity by 2%. What span error does this generate?
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribution of the battery lives closely follows the normal probability distribtion with a standard deviat..
Assuming that all other variables are held constant describe how value of z is influenced by each of the following: If alpha level is changed from a = .05 to a = .01. What occurs to boundaries for the critical regions?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
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