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1.Find a peer-reviewed article that provides an example of a study where the researchers utilized linear regression. Briefly describe the study and discuss its findings in your own words. 2. Find a peer-reviewed article that provides an example of a study where the researchers utilized a one sample chi-square OR a two sample chi-square. Briefly describe the study and discuss its findings in your own words.
He received a score of 70 on a biology test for which the class mean was 70 with standard deviation of 4. On which test did he do better relative to the rest of the class?
What value will standard deviation σ x of sampling distribution approach? How do two x distributions for sample size n = 50 and n = 100 compare?
What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.
Construct a scatter plot and calculate the slope and intercept in this problem
A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years - significance level is there sufficient evidence to justify the doctors belief?
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
Provide a 95% confidence interval for the population proportion of college students who work to pay for tuition and living expenses.
If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the number of useable parts in a package?
If the standard deviation of the population is 9 hours, determine whether there has been a significant increase in battery life expectancy.
The average gasoline price of one of the major oil companies has been $2,25 per gallon. Recently, the company has undertaken several efficiency measures in order to reduce prices. Management is interested in determing whether their efficiency meas..
Find a % confidence interval for the difference in average absorption time for the two drugs. Does it appear that one drug is absorbed faster than the other at the % significance level.
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n=10, you determine that r=0.80.
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