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A video store needs to keep enough recorders in inventory to meet customer demand. But keeping inventories to meet all demand is costly. The manager estimates that 90% of consumer demand for videos will minimize cost. If the monthly demand for videos on average is 180 and standard deviation = 60, what is the number of videos the manager should order to meet 90% customer demand?
Describe the types of probability -example of classical probability, empirical probability, or subjective probability.
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
The software manager estimates a value completed of $81,000. What are the cost and schedule variances and CSI. Estimate the time variance.
If a fair six-sided die is rolled 1200 times, find the probability that an even number will occur at most 620 times.
D. The Sunbeam Corporation makes a wide variety of appliances for the home. One product is a digital blood pressure gauge. For obvious reasons, the blood pressure readings made by the monitor need to be accurate.
What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
Determine the minimum sample size required using prior study that found that 54% of respondents said they have high-speed Internet access.
The drug Ancrod was tested in a double-blind clinical trial in which subjects who had strokes were randomly assigned to get either Ancrod or a placebo.
Calculate correlation coefficient for data below. Compute the equation for regression line if n=7, Ex=69, Ey=528 Exy=4754 and Ex^2=825
Define the null and alternate hypotheses for the statistical test to find out if there is evidence that average weight of Smoky Bear moving van is more than 12,000 lb.
What is the probability that a sample mean will be within plus-or-minus two of the population mean for each of the following sample sizes?
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
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