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A resercher wishes to estimate, with 90% confidence, the proportion of adults who have high-speed internet access. Her estimate must be accurate within 4% of the true proportion.
a) What is the minimum sample size needed using a prior study of 52% of the respondents said they have high-speed internet access?
b) What is the minimum sample size needed assuming that no preliminary estimate is available?
cereal is sold by weight not volume. this introduces variability in the volume due to settling. as such the height to
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment.
would this prove that they are exceeding their goal, using α = .025?
What size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 5 percent?
Appalachian Coal mining believes it can enhance labor productivity and therefore net revenue by reducing air pollution in its mines. It estimates that the marginal cost function for reducing pollution by installing additional capital equipment is.
The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?
Suppose a single pineapple is selected at random from last years crop. What is the approximate probability that it weighs more than 35 ounces show work.
questionthe following data represents the car tyres life time in days for three different companies in indiacompany
question consider the following record of sales for a product for the last 100 days. sales unitsnumber of days
Given the Life expectancy data for the countries of the E.U., can we conclude that the mean Life Expectancy in the U.S. is greater than the mean Life expectancy in the E.U.?
If there is evidence that percentage of polished lenses that contain surface defects does not exceed 2%. A random sample of 240 lenses contains 5 defective lenses.
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