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The probability of recovery for a certain disease is 0.65 or 65%. If 50 people are stricken, what is the probability that
a. 25 or more will recover?
b. Fewer than 5 will recover? using normal approximation
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
A real estate investor has two houses: A and B. Each house may increase in value, decrease in value, or remain unchanged. Consider the experiment of investing in the two houses and observing the change (if any) in value:
When using the normal distribution (empirical rule) to obtain the bounds for 99.73 percent of the value in a population, the interval generally will be ______the interval obtained for the same percentage if Chebyshev's theorem is assumed., shorter..
In a normal frequency distribution, 32% of the cases:
If the sum of squares total is 800 and the sum of squares error is 170. What is the r-squared value?
A car rental company has determined that the probability a car will need service work in any given month is 0.2. The company has 900 cars.
Develop an appropriate forecast model for the given problem whereas the student population has remained constant during this period.
As a sample size approaches infinity, how does the student's t distribution compare to the normal z distribution? When a researcher draws a sample from a normal distribution, what can one conclude about the sample distribution? Explain.
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
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