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Tesearcher wants to estimate, with 95% confidence, proportion of adults who have high-speed Internet access. Her evaluations should be accurate within 1% of the true proportion.
a.) Determine the minimum sample size required using prior study that found that 54% of respondents said they have high-speed Internet access.
b.) No preliminary estimate is available. Determine the minimum sample size required.
If 49 participants (49 = size of the sample) are chosen randomly, what is the probabilty that their mean spent amount will be in $6 of population mean? (mean+/-6).
Also, 72 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
What is the probability of finding exactly four watch soap operas?
An automotive manufacture claims mean price of small SUV is $25,071 if hypothesis test is performed how you should interpret a decision,
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
What is the probability that the mean completion time is between 1 and 2 hours, i.e.., 60 and 120 minutes?
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
Compute the length-of-life value for which 10% of the watch's batteries last longer.
A political strategist believes that less than 55% of voters in a certain state support a particular issue. He then commisions a poll of 500 voters and 54% of them support this issue. If = .05, is the political strategist's belief warranted?
If the research question were defined as will buyers purchase more of a product in a blue colored or silver package? the most appropriate type of research would be
A certain model of remote-control Stanley garage door opener has nine binary (off/on) switches. The homeowner can set any code sequence.
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