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Question: According 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.
Is there evidence of a difference in the variances of the order values between social shoppers and other online shoppers? Yes. I used a upper-tail f-test for the difference of two variances.
The sample mean price is computed from the prices at these gas stations. What is the probability that the sample mean price falls within a nickel of the State's overall mean price? i.e between 3.09 and 3.19.
a sample of 31 different payroll departments found that employees worked an average of 3103 day a year with a
indy 31.4 is a radio station that plays music 24 hours a day 7 days a week. they have edited every song they play so
Now find the appropriate center line and control limits for an x chart, make the x‾ chart, and comment on control.
Test the hypothesis that the median amount spent on books at this university is $325 against the alternative that it is different using the large-sample sign test. Use α = 0.05.
At all times, the urn comprises N balls-some white balls and some black balls. At each stage, coin having probability p, 0
Can you determine the number of levels used for each factor? Explain. Describe a treatment for this experiment and determine the number of treatments used.
Based on the various stepwise approaches and "best-subsets" approaches for selecting an excellent (if not optimal) fitted multiple regression model, which one approach would you select if you had to explain to a client what your chosen model is an..
Suppose the null hypothesis was rejected at a significance level of 0.10. The power of the test was 0.81. What type of error could be made and what is the probability of making that error?
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
There is concern about the percent of on-time flights. A recent survey of two major airlines yielded the following results. At α = 0.05 test the claim that there is a difference in proportions of on-time flights.
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