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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.
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
Eagle airlines' planes hold only 15 people. Past records indicate that 20% of the people making a reservation do not show up. We will assume that all reservations are independent; that is each reservation is for one person and these reservations a..
Does the confidence interval contain the value of 35 mm, which is believed to be the standard deviation of sitting heights of women?
If the loss of weight of customers at the end of their first month is normally distributed with a mean of 6.7lbs and a standard deviation of 0.81lbs
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
a) 95% of confidence intervals generated will include the sample mean X. b) 5% of the confidence intervals generated will include the true mean μ
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with a mean of 3.2 pounds and a standard deviaition of 0.8 pound.
In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select one vial from the shipment, what is the probability that it has a hairline crack?
College students are a major target for advertisements for credit cards. At a university, 65% of students surveyed said they had opened a new credit card account within the past year. If that percentage is accurate, how many students would you exp..
The chamber of commerce of a Florida Gulf Coast community advertises that area residential property is available at a mean cost of $125,000 or less per lot.
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error?
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