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The following table gives the approximate age distribution in the United States from the 2000 census.
Age Population19 & under 29%20 - 34 21%35 - 59 34%60 - 84 15%85 & over 1%
a. Does the data listed above comprise a valid probability distribution? Explain.
b. What is the probability that a randomly selected person in the US will be at least 20 years old?
c. What is the probability that a randomly selected person will be less than 60 years old?
d. What is the probability that a randomly selected person will be less that 20 years of age or more than 85 years old?
e. What is the probability that a randomly selected person is not older that 59?
What is the relationship between descriptive statistics and Affirmative Action ? Can using probability in market trending decisions lead to a bad decision? Explain?
Determine the standard error of students that favoured the move.
The sat scores attainted by the students in nyc are approximately normally distributed with a mean of 500 and a standard deviation of 80. Find the percentage of students who score less than 700.
Note that under the exponential assumption, P(X>t) = exp(-t/theta). If t=5, use the result from (a) to find an approximate one-sided lower 95% confidence limit for theta.
In a class roster of 18 students, what are the chances that there are at least 2 people with the same birthday (same day, not same year)?
Find out the probability that the return for common stocks will be more than 0%.
Assume the population is normally distributed, the confidence level is 95%, n = 12, and σ is unknown.
Number of rescue calls received by rescue squad in city follows a Poisson distribution with mu = 2.83 per day. Squad can handle at most four calls a day. Determine the probability that squad will be able to handle all calls on a particular day?
Use this information to make a 95% confidence interval to evaluate true average number of copies made each day at this company.
Assume a linear relationship, use the least square method to find the regression coefficients bo and b1 and Predict the mean kilowatt usage when the average temperature is 50 degrees Fahrenheit.
The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:
A process follows the binomial distribution with n = 8 and p = .3. Find
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