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Inference Concerning the Difference Between Two Population or Treatment Means Using Paired Samples Independent samples: Two samples for which the individuals or objects in the first sample are selected independently form those in the second sample. Paired samples: Two samples for which each observation in one sample is paired in a meaningful way with a particular observation in the second sample. Are wine drinkers being misled by bottle labels?
The past history shows that 60% of employees prefer Starbucks brand coffee. A sample of 5 employees is selected, what is the probability that less than 3 prefer Starbucks?
Jeweller desires to know how many of each item to make each week to maximize profit. Create the integer programming model for this problem (written in format similar to way Problems 1 and 2 were presented).
A binomial experiment has 10 trials with a probability of success of 0.62 in each trial. What is the standard deviation of the binomial random variable?
The test has a reliability of .87 and a standard deviation of 5. Joe scored a 57 on the test and Jill scored a 62. Is Jill clearly superior to Joe? Explain your answer.
Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?
The number of viewers of American Idol has a mean of 33 million with a standard deviation of 10 million. What is the probability that next week's show will: Have between 37 and 44 million viewers?
The average efficiency of the sample is calculated to be 91.0% and the standard deviation of the sample is 0.8%. If we want to cut the confidence interval by one-half, how many more motors should be tested?
Compute the test statistic. Using = 0.05, perform the test using either the critical value approach or the p-value approach. What is your conclusion?
A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
Briefly discuss probability distributions. What is a normal distribution? Please provide a written example of how 'understanding distribution' can be an asset for any business project.
The progress report of a research analyst to the supervisor stated: "All the estimated regression coefficients in our model with three predictor variables to predict sales are statistically significant.
What internal and external threats are and could you provide some examples of what would be considered a threat to internal and/or external validity of a study design.
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