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Two fair six-sided dice are tossed independently. Let X be value of first die, and Y value of second. Find out the expectations of following random variables.
a. X + Yb. |X -Y |
The mean and variance of the total amount of money that is collected from a car that crosses the bridge are:
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
What is the probability that a cereal would both high calorie and high fiber? In other words, what is P (high calorie and high fiber)?
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
Develop a frequency distribution table with proportions. What is an experiment? Can you describe what a Group Frequency Distribution Table is and what it looks like?
Carry your intermediate computations to at least four decimal places. Round your answer to at least two decimal places.
The election is one week away. You think you have the election sewn up, but the seem appears to be unraveling. You run a poll, draw a random sample of 500 adults.
Times spent studying by students in the week before final exams follow a normal distribution with standard deviation 8 hours. A random sample of four students was taken in order to estimate the mean study time for the population of all students.
Consider the results of the hypothesis test you conducted above. Which of the two types of errors could you have committed? Explain the ramification of committing such an error in the context of this scenario.
A random sampling of financial analysts was asked to provide forecasts of earnings per share of a corporation's stock for the next year. The results are summarized as follows:
A recent article in Vitality magazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test.
Listed below are the highway fuel consumption amounts (in mi/gal) from cars in three different categories. Use a 0.05 signifiacance level to test the claim that the different car categories have the same median highway fuel consumption.
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