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1. x P(x) 0 0.17 1 0.45 2 0.20 3 0.12 4 0.06>4 0.00
The following probability distribution table is for the random variable, x, the number of children under the age of 20 years in households of a small town. Remember to show all work to answer the following questions.
a) Determine the mean of x.
b) Determine the standard deviation of x.
c) Find the probability of a household consisting of 3 or more children under the age of 20
Round all answers a - c to 2 decimal places.
a large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and
The sample mean and standard deviation were determined to be 1511.4 pages and 35.7 pages, respectively. The historical average lifetime for cartridges produced by the current process is 1502.5 pages. At α = .05, test the claim that the new cartridge ..
the margin of error for a 95% confidence interval and then construct to the 95% confidence interval for the population proportion. Construct a 95% confidence interval for the population proportion p of all Twinkle bulbs.
Based on the empirical rule, what percentage of data fall within 1 SD, 2 SD, and 3 SD of the mean for data that are distributed normally?
What statistical test should be used to analyze these data? Identify H0 and Ha for this study. Conduct the appropriate analysis.
Payroll. A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a week, six stock boys at $400 a week, and four drivers at $500.
A simple random sample of size n = 40 is drawn from a population. The sample mean is found to be 106.7?, and the sample standard
If you are interested in determining if there is sufficient evidence to conclude, at the 10% significance level, that the two teams differ with respect to their proportions of unacceptable assemblies, what is/are the critical value you would use t..
Suppose you invest $2,000 today and receive $9,500 in five years. a. What is the internal rate of return? (IRR) of this? opportunity?
As evidenced by the growing number of corporate scandals of which almost all involve the CEO and other top officers, corporate America in many cases is missing one essential leadership ingredient-character.
a discrete random variable x can assume 5 possible values 2 4 6 7 and 9. its probability distribution is shown
You have made plans to attend the theater alone. The tickets cost $20 each. Consider the following two scenarios.
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