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An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 6.0 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.
(a) What is the probability Linda Lahey, company president, received exactly 3 emails between 4 P.M. and 5 P.M. yesterday? (Round your answer to 4 decimal places.)
(b) What is the probability she received 7 or more emails during the same period? (Round your answer to 4 decimal places.)
(c) What is the probability she did not receive any emails during the period? (Round your answer to 4 decimal places.)
A bowl with 10 marbles: 2 red marbles, 3 green marbles, and 5 blue marbles. We randomly select 4 marbles from the bowl, WITH REPLACEMENT, that is once a marble is selected, its color is noted and the marble is put back in the bowl (notice this doe..
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
Compute b1, slope of an OLS regression line using dollars spent as dependent variable (Y) and age as independent variable (X).
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
A doctor prescribed the drug penicillin to three different patients as a form oLtreatment for an infectious disease. It is known from the general population that 20 out of every 100 individuals are allergic to the drug.
A random sample of 100 peaches is gathered and the mean diameter is calculated. What is the probability that the sample mean is greater than 3.79 inches.
Fast Service Store has maintained daily sales records on the various size 'Cool Drink' sales. These are shown in the following table:
What percent of the Fords traveled 62.000 miles or less during the year?
Alice and Bob agree to meet at the bus stop between 12 noon and 1pm. They each arrive at a random time in that interval and wait for 5 minutes before leaving, unless they see the other person. What is the probability that they meet each other?
A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
What is the probability of flipping a coin 6 times and getting 4 or more heads?
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