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F (x) : 2. Find mean , variance 2; and standard deviation Of continuous r.v. Let X equal weight of a randomly selected quarter-pounder in pounds. What is P (0:20 < X < 0:30)? The probability density function (p.d.f.) Of a continuous r.v. Let f (x) = 3x2 for 0 < x < 1: 1. Is f (x) a valid p.d.f.?
Forecast the number of deliveries utilizing exponential smoothing constant for different values also compare it. A hospital records the number of floral deliveries its patients receive every day.
CHris Turlock owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city.
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
It is estimated that the probability that the general population will live past their 85th birthday is 5.4%. Use the standard normal distribution to approximate this Binomial problem and answer the following questions.
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals.
Describe a study you might design that could use the Chi Square statistic. What are the variables? What are the null and alternative hypotheses? Why would the Chi Square test be appropriate for this design?
If one person is selected at random, what is the probability that person is Female?
Suppose a random sample of 50 architects and engineers is selected. How likely is it that the random sample contain five or fewer women in these positions.
Explain the meanings of Ho and Ha in Hyphothesis Testing. When would Ho be accepted and when would Ho not be accepted? (Complete answer in no more than five concise sentences.)
Do we have to worry about confounding variables in this instance? Why? If so identify a possible confounding variable? Are either of the terms retrospective study or prospective study relevant? Explain.
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