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A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 3 percentage points with 95% confidence if
a) he uses a previous estimate of 36%? (round up to nearest integer)
n = ?
b) ge does not use any prior estimates? (round up to nearest integer)
Hamburger Joe's sells the best burgers in town. The variable unit cost for making one burger is $.97. The fixed cost of making burgers for 12 months will be a total of: $140,000.
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
an internal revenue oversight board survey found that 82 of taxpayers said that it was very important for the internal
To find a better model, use a transformation on length. One possibility is to use the square. Fit a least squares line using transformed length to predict weight. Write down the equation of the line (model).
Describe and perform the five-step hypothesis test process: set up the hypothesis, select a level of significance, establish the decision rule, calculate the test statistic, and draw conclusion.
The mean difference in times between the experiment is -9.4 minutes with a standard deviation of 2.8 minutes). Construct a 90% CI for the proportion of patients who experience stomach upset with the experimental medication.
Given following financing project being considered by venture film, determine critical path probability of completion by 17 weeks.
a town has 20 000 registered voters of whom 8800 are democrats. a survey organization takes a simple random sample of
Suppose a small bicycle manufacturer makes cheap bikes that sell for 180$ each. The total cost of producing x bikes (in $) is given by c(x)=6000+240x-0.8x^2, where x is up to 200 bikes.
Develop a contingency table that shows whether a home has a pool and the township in which the house is located. Is there an association between the variables "pool" and the "township"? Use .05 level of significance.
What are the benefits and drawbacks of traditional and authentic assessments in math and science?
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