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The discussion surrounding the ANOVA is very important. This is a widely utilized statistical tool. What is the ANOVA? What is the purpose of the ANOVA? What role does variation have in the disc
Does knowing high school seniors' IQ scores indicate anything about their high school graduation grade point averages and Is there a relationship between a person's sociability and cheerfulness
Explain briefly why ANOVA was the appropriate analysis for these data and finish the ANOVA table giving the F-statistic, degrees of freedom, and approximating the p-value. Show your work. What is your
Suppose you want to determine whether students' expected grades at the beginning of an introduction to statistics course are positively related to their final course grade. Write the null and altern
Shown below are the results of a one sample t test. Make up a problem that someone could solve using the printout. Do not make up the data. Just assume the data were collected and produced the given
Is there sufficient evidence at the alpha =0.05 level to support the researcher's claim?
Use the SPSS output to determine if there is sufficient evidence to conclude that Sally bakes a better pie than Pat (i.e., the average rating for Sally at her church is higher than the average ratin
positive correlation between CEO salary and the Stock Price, and therefore, for the good sake of the company's stock value, his salary should be increased. Do you agree with his argument? Explain wh
Identify a pair of variables for which you would expect to see a strong correlation but not a cause-and-effect relationship. Suggest an explanation for the association.
The East Coast researcher decides to construct a two-sided 99% confidence interval. Which researcher will have the more precise estimate?
List the experiments and random run orders if we are to run a fractional design and describe how you would analyse the data in each of the situations defined in (a) and (b) above.
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportions of children are ov
Compute the Cumulative incidence of stroke in the study and compute the Cumulative incidence of stroke in patients classified as hypertensive at baseline
How many participants must be enrolled in the study? Assume that the standard deviation of total cholesterol is 18.5.
Is there a statistically significant difference in the proportions of women delivering preterm among the three treatment groups
Article summarizing a study to compare a new drug to a standard drug and to a placebo - baseline characteristics are significantly different (at the 0.05 level of significance) between treatment group
What is a "Chi-Squared Test"? Provide a fully referenced explanation and provide a brief example on a Chi-squared test, fully referencing all sources of information.
Based on comparing the computed statistics to the critical value which of the following is true - study is designed to investigate whether there is a difference in response to various treatments in p
The data are shown below. Generate a 95% confidence interval for the difference in mean HDL levels between men who exercise regularly and those who do not.
Based on comparing the computed statistic to the critical value which of the following is true and BMI for Boston residents is significantly different than 25.
What type of educational background do CEOs have? In one survey, 344 CEOs of medium and large companies were asked whether they had an MBA degree. There were 97 MBAs
Create a risk profile for EPC, how risky is EPC's best solution and suppose the CEO of EPC has reservations about your analysis of his key decision on new product introduction.
Find the combination of Model Alpha and Model Beta that maximizes the firm profit. What is firm's profit at this profit mix and shows the combinations of Model Alpha
How long is a broken machine out of service and how many machines are awaiting repair - the repair time follows an exponential distribution, and Ray repairs the machines in the order in which they bre
What are the input and the output of linear regression, and what does the coefficient of determination measure and what is the purpose of measuring correlation?