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A psychologist thinks that kind of feedback person receives about their work affects quality of work. You randomly assign 12 widget makers to one of three groups: positive feedback only, corrective feedback only, and no feedback. You track number of widgets that each person makes correctly (out of 10) and got following data:
Positive Feedback Only Corrective Feedback Only No Feedback5 4 54 5 44 3 67 6 2
Use the analysis of variance (α = 0.05) to find out whether this data is sufficient to conclude that there are significant differences between feedback conditions.
Ensure you include the complete ANOVA summary table. Also, report suitable null and research hypotheses and critical value (alpha = 0.05). Additionally, give your statistical conclusion, comprising calculation of test statistic, in APA format and conceptual conclusion in one to two sentences.
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Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
At.01 significance level, can we conclude that there is more variation in selling prices of oceanfront homes?
The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
Explain why it might be important to look at cancer incidence that is age-adjusted rather than just cancer incidence. Perform simple linear regression on these data and report your finding.
Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
Develop a seasonally adjusted forecast model for these sandwich sales data. Forecast demand for each season for 2004 using a linear trend line estimate for sales in 2004. Do the data appear to have a seasonal pattern?
A study conducted at a certain college shows that 53% of the school's graduates find a job in their chosen field within a year of graduation. Find the probability that among 7 randomly selected graduates, at least one finds a job in his or her cho..
A four-year financial project is forecast to have net cash inflows of $20,000; $25,000; $30,000; and $50,000 in the next four years. It will cost $75,000 to implement the project
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
How many students should be surveyed if a 90% confidence interval is desired and the margin of error is to be only 3%?
The goal at U.S. airports handling international flights is to clear these flights within 45 minutes. Let's interpret this to mean that 95 percent of the flights are cleared in 45 minutes
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