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Two cards are drawn without replacement from a pack X measures hearts drawn and Y measures clubs drawn, both are random variables.
1. What is the joint probaility mass function of x and y. Explain
2. What are the marginal probability mass functions of x and y.
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Index number acts as a barometer for measuring the value of money. What are the characteristics of an index number? State its utility.
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
What is the value of the slope of the least squares regression line for these data? Round your answer to at least four decimal places.
Compute the coefficient of correlation and the coefficient of determination and determine the regression equation.
Calculate the expected value and standard deviation of the value.
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
Compute the proper measure of association of smoking and lung cancer.
Conduct a one-tailed hypothesis test for the mean at the .025 significance level. State the null and alternative. State the critical value. Draw a diagram. Provide the computation of the test statistics. State your decision in terms of the null hy..
The random number generator on calculators randomly generates a number between 0 and 1. The random variable X, the number generated, follows a Uniform Probability Distribution. What is the probability of generating a number between 0 and 0.2?
Joe has started an iphone booth in the mall. His francise booth and other startup costs total $82,000. Joe expects to pay $240 per iphone unit and sell them for $390 each. Joe needs to reach a 10% profit margin.
A human society claims that less than 36% of US. households own a dog. In random sample of 397 U. S. households, 151 say they own a dog. At mean=0.03, is there enough evidence to support the society's claim?
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