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Sony's new optical disk system prototype tested and claimed to be able to record an average of 1.2 hours of high-definition TV.
Assume n = 10 trials and σ = 0.2 hour. Give a 90% confidence interval.
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
at a track and field tournament freds long jumps vary evenly from 6.5 to 7.2 meters. let x be the length of freds long
a camera manufacturer just shipped a batch of 36 digital cameras to local retailers and seven of the cameras have a
If 350 respondents out of a random sample of 1,000 Americans reported that they did not trust their government, what is your estimation at a 99% confidence level of the proportion of the American population who do not trust their government?
The daily expenditure on food by a traveler, in dollars in summer 2006, was as follows: 17.5, 17.6, 18.3, 17.9, 17.4, 16.9, 17.1, 17.1, 18.0, 17.2, 18.3, 17.8, 17.1, 18.3, 17.5, 17.4.- Find the mean, standard deviation, and variance.
binary communication system transmits bit 0 or 1 every bit interval. probability of transmitting bit 1 and 0 are
What is the difference between statistical significance and practical significance?- Discuss the reasons that a researcher might obtain non significant results.
A normal tomato will gain an average of 2 ounces per week during the growing season. A sample of 100 tomatoes is given a special hormone to increase their growth.
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the 0.10 level of significance, that the average trunk diame..
A client has an investment portfolio with mean value is equal to 4500 USD, with a standard deviation of 300 USD. What is the probability that the value of her portfolio is between 3900 USD AND 5400 USD?
Perform a chi-square test on the following data:
using a particular set of data 3 types of forecasting methods were used on that data set? the first forecasting method
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