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A student team in a business statistics course wanted to determine if there was a difference in average download times for the three different types of computers (Mac, iMac, and Dell) available at the university library. The students randomly selected one computer of each type. The students went to the Microsoft game Web site and clicked on the download link for the NBA game. The time (in seconds) between clicking on the link and the completion of the download was recorded. Using ANOVA, they compared the download times with a resulting p-value of 3.43 E-12. A .01 level of significance was used. State the null and alternate hypotheses, state whether the null hypothesis should be rejected or not rejected and your reason for that conclusion, state the meaning of that conclusion specifically in terms of the problem being studied.
A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day
When determining the sample size necessary for estimating the true population mean, which factor is not considered when sampling with replacement
Since Variable 15 was determined to be categoric, regression was not appropriate to use; so I used Analysis of Variance (ANOVA) to examine if there was a significant relationship between Variable 8 and 15. The results (using Systat 13.0) are print..
In a random sample of 225 students at a university, 180 stated that they were nonsmokers. Based on this sample, compute a 95% confidence interval for the proportion of all students at the university who are nonsmokers.
hypothesis testing of single mean.dole pineapple inc. is concerned that the 16-ounce can of sliced pineapple is being
the boston public school district has had difficulty maintaining on-time bus service for its students a year later
the sample space of equally likely outcomes for the experiment of rolling two fair dice is
You are asked to match three songs with the performers who made those songs famous. if you guess, the probability distribution for the number of correct matches is:
womens heights are normally distributed with mean 63.7 in and standard deviation of 2.5 in. a social organization for
the data on the number of chocolate chips per bag for 42 bags of chips ahoy cookies were obtained by the students in an
You are conducting a study on what socio-demographic factors could be behind the behavioral problems of students. You are looking at how many times a student was sent to detention. You have information on race, gender, household median income, single..
find the area under the normal curve to the left of z -1.57 plus the area under the normal curve to the right of z 2.57
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