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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
Find the linear correlation coefficient for the systolic and diastolic measurements - determine the linear regression equation that uses the systolic pressure to predict the diastolic pressure.
1 if x is a poisson distributed random variable with a mean of 3 and y is another poisson distributed random variable
Assuming normal populations with equal standard deviations, use the 0.025 level of significance in testing the engineer's claim.
Wwho are also athletes but who are not regularly hit in the head. Is this an example of an experimental or nonexperimental study?
In your own words, explain the differences among the following techniques: simple random sample; stratified sample, systematic sample, cluster sample, and convenience sample
Assume that the two populations of appreciation rates are normally distributed and that the population variances are equal. Can we conclude, at the level of significance, that houses in Sun Beach have higher appreciation over the past three years..
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
Find the probability that the test for a pooled sample of k people will be positive - what is the expected value of the number X of tests necessary under plan
A random variable is binomially distributed with n = 16 and π = .40. The expected value and standard deviation - find the sample size to estimate the mean with an error of ± 4 and 95 percent confidence (rounded to the next higher integer).
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank sum test, evaluate the significance of the results, assuming there are no ties.
From a practical point of view, what is the difference between the frequency distribution and relative frequency distribution? Why is a cumulative relative frequency distribution so much more informative that just the relative frequency distributi..
Write a 2- to 3-page essay in which you begin to discuss the spread of the data that you have been collecting by: Compute the variance of the measurements that you have taken so far. Show your work
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