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Media observers have been examining the number of minutes devoted to business and financial news during the half-hour evening news broadcasts of two local television channels. For each channel, they have randomly selected 10 weekday broadcasts and observed the number of minutes spent on business and financial news during that broadcast. The times measured in these independent samples are shown here. Assuming normal populations with equal standard deviations, use the 0.10 level of significance in testing whether the population means might actually be the same. Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for the test? Construct and interpret the 90% confidence interval for the difference between the population means.
Channel 2: 3.8 2.7 4.9 3.4 3.7 4.5 4.2 2.8 3.5 4.6 minutes
Channel 4: 3.6 4.0 4.5 5.2 4.8 4.3 5.7 3.5 3.7 5.8 minutes
assume that you have a box with an equal number of 4 6 8 chips.a. find the population mean and the standard
The president of an agency specializing in public opinion surveys claims that approximately 70% of all people to whom the agency sends questionnaires responds by filling out an returning the questionnaire.
The data follow. Males Females 27 25 25 29 19 18 10 23 16 20 22 15 14 19 (a) What statistical test should be used to analyze these data?
suppose that the number of murders in detroit follows a poisson distribution with a standard deviation of 22 murders in
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suppose that a flaw in a certain computer chip installed in computers was discovered that could result in a wrong
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Robert Smith of the "Merrill Lynch Pierce Fenner & Smith" families is engaged in full-time fundraising. He has been quite successful at this because he brings a very structured approach to the process:
A sample from a population with μ = 40 and =σ10 has a mean of m = 44. if the sample mean corresponds to a z = 2.00, then how many scores are in the sample?
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