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For given problem, give a 99% confidence interval for the difference between the proportions for viewers of the two shows who watched 1 to 6 commercials. Interpret the results.
ProblemAccording to a study reported in the New York Times, 48% of the viewers who watched NFL Football on TiVo viewed 1 to 6 commercials, while 26% of the viewers who watched Survivor: Cook Islands on TiVo viewed 1 to 6 commercials.
If this information is based on two independent random samples of 200 viewers each, test for equality of proportions using α = 0.05.
In a large clinical trial of 500 patients treated with a new drug, 40 reported sideeffects how many patients would need to be sampled to estimate the desired proportion to within a margin of error of 1%, using 98% confidence?
What is your reaction to the radio station's claim after seeing the sample evidence? Use α=.05 in making the statistical test. What is the p-value?
Error terms in the simple linear regression model except and estimate of the variance in a regression model
Jane chooses every 20th person in the campus phone book to call for her interview study. Justin identifies important subgroups in the campus population
Find the output autocorrelation in terms of the input autocorrelation. - Find the output PSD in terms of the input.
In the general population the mean white blood count is 7250 per mm3. It is believed that persons infected with E. canis must on average have a lower white blood cell count. What is the null hypothesis for the test? Is this a one- or two-sided alt..
For the most recent year available the mean annual cost to attend a private university in the US was $26,889. Assume the distribution of annual costs follows a normal probability distribution and the standard deviation is $4,500. 95% of all studen..
Calculate the standard deviation of conductance
Kyle averages 7 finished accounts a day. His standard deviation is 2 account per day and we wish the probability that Kyle will finish day with more than 8 finished accounts. Probability will be?
You are given some information about a sample of data. It is known that the sample variance for this set of data is 10. You are also told that the sum of the squared deviations from the sample mean is 510 (see below). What is the size of this samp..
What is the probability an applicant does not pass the test and is a sucessful manager?
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
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