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The National Park Service has started charging a user fee to park at selected trailheads and crosscountry ski lots. Some users object to this fee, claiming they already pay taxes for these areas. The agency has decided to randomly question selected users at fee areas in Colorado to assess the level of concern.
a. Define the population of interest.
b. Assume a sample of 250 is required. Describe the technique you would use to select a sample from the population. Which sampling technique did you suggest?
c. Assume the population of users is 4,000. Use either Minitab or Excel to generate a list of users to be selected for the sample.
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
If a claim is randomly selected, what is the probability the person was under 25 or male?
Let the random variable X denote the number of emergency calls received by the campus police office each day. The probability mass function of X is given by:
Pedestrians can press at traffic intersections. It was found that 77% of those buttons do not work. Is the figure of 77% a parameter or a statistic?
Show the sampling distribution of p if a random sample of 150 insured individuals is used to estimate the proportion having received at least one ticket.
Suppose the assembly times follow normal distribution. Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
This problem related to Basic Statistics and it discuss about the different methods in sampling. Two sampling methods to research in the IT field have been given in the solution
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A national survey of restaurant employees found that 75% said work stress had a negative impact on their personal lives. A sample of 100 employees from a popular restaurant chain finds that 68 answer
List all outcomes corresponding to the five smallest possible values of Y, and state which Y value is associated with each one.
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