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Consider the following news headline, "Cigarette Smokers Make Lower College Grades than Nonsmokers" The news article goes on to say that researchers at a university collected information on rate of cigarette smoking (total number of cigarettes smoked in a one month period) and the college student's current GPA for completed college courses. They found that those with higher levels of cigarette use had lower GPAs, and vice versa. What can you rightfully conclude from this? Why? Be specific about what this kind of information may indicate and mean.
Construct 90% and 95 % confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.
Scores on a marketing exam are known to be normally distributed with mean and standard deviation of 60 and 20. a) Find the probability that a randomly selected student scores between 50 and 80. b) Find the probability that a randomly selected student..
Collect data about hair salons clients vs. walk In's and product vs. services. Explain how you obtained a suitable sample of either qualitative or quantitative data. Review data for validity and reliability. Use descriptive statistics to summarize da..
what is the significance of hypothesis in research? what are type i and ii errors inhypothesis
Describe each r value in words
Tim is a plumber who joined a barter club. This year Tim exchanges plumbing services for a new roof. The roof is properly valued at $2,500, but Tim would have only billed $2,200 for the plumbing services. What amount of income should Tim reco..
In the model X1, X2, and X3 are the number of units of three products or services to make. The constraints are: machine time (minutes), labor (hours), budget (in $), and a limit on the number of units of X3. The objective is to maximize profit. Note:..
Find the probability that a randomly selected employee earns less than $7.53
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options? Are there cases in which the assumptions may technically be violated, yet have no impact on your intended analyses? Explain
If the probability that you will correctly reject a false null hypothesis is 0.85 at 0.01 significance level, α is______________ and β is______________.
The Glass Slipper restaurant has operated in a resort community
Compute the mean median, and mode
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