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What is the difference between qualitative and quantitative data? Provide an example of each type.
What is a null and alternative hypothesis?
What is a variable? What are independent and dependent variables?
What is the difference between population and sample? When would you want to use a sample? How would you go able obtaining a sample?
What is the difference between probability and non-probability sampling? Which sampling method would strengthen the research design? Why?
The national average SAT score (for Verbal and Math) is 1028. If we assume a normal distribution with σ = 92, what is the 90th percentile score? What is the probability that a randomly selected score exceeds 1200?
Is there reason to believe there is a positive linear correlation between the number of t.v. commercials and the sale of this product?
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
Compute standard normal z-score corresponding to value of x = 23. e. Determine P(x 23). G. Determine P(16
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
Of the estimated natural gas reserves in North America, 4.59 *10^9 m ^3 are in United States. 2.66*10^9 m^3 are in Canada, and 1.99*10^9 m^3 are in Mexico.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years.
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution.
Of 260 females, 224 answered yes. Construct a contingency table to evaluate the probabilities. What is the probability that a respondent chosen at random:
The following data were obtained from an independent measures research study comparing three treatment conditions. Use an ANOVA with alpha=.05 to determine whether there are any significant mean differences among the treatments.
The random variable X has which of the following probability distributions and What is the probability that no student wins
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