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Q1. Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Q2. What is blocking and how does it reduce "noise"? What is a disadvantage of blocking?
Q3. What is a factor? How can the use of factors benefit a design?
Q4. Explain main effects and interaction effects.
Q5. How does a covariate reduce noise?
Q6. Describe and explain three trades-offs present in experiments.
Is there enough evidence to reject the claim that the average cost of a home in both locations is the same? Use α = 0.01. Clearly mark each of the five steps in hypothesis testing.
How does your answer change if you flip the coin 400 times in- stead?
What is the purpose of statistical estimation? What statistics do you find most useful in regression analysis? Why?
Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
Suppose the mean time that was observed for the sample last month was 4 hours 44 minutes (284 minutes). What is the probability of seeing a sample mean this high or higher?
Calories in each hamburger measured. Can the reporter conclude, at α = 0.05, that the hamburgers from the two chains have a different number of Calories?
Ffind the mean, variance and standard deviation of binomial distribution? what valuses of the random variable X would you consider unusual?
Ethics The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase?
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500.
Following data represent concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Sample standard deviation is?
Create an research question, and then state the experimental and null hypotheses. Then, explain why null and alternative hypotheses have to be mutually exclusive. Finally, discuss how Type I and Type II errors are related to your hypotheses.
Describe a 5-step hypothesis test of multiple means (using the one-factor or the two-factor ANOVA test process) for a particular claim related to your work or life environment.
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