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Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern. Describe and give examples of research questions in which internal validity is a primary concern. Discuss strategies researchers use in order to make strong claims about the applicability of their findings to a target population.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
Find the probability that follows Binomial distribution.
Five homes were recently sold in Oxnard Acres. Four of the homes sold for $400,000 while the fifth home sold for $2.5 million. Which measure of central tendency best represents a typical home price in Oxnard Acres?
A certain airplane has 2 independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 hour flight is 0.02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the othe..
Do not forget to test for any applicable difference in means (Tukey implies).
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Determine the mean and standard deviation of following probability distribution.
Research on new juvenile delinquents revealed that 38% of them committed another crime. What is the probability that 40 or fewer of the delinquents will commit another crime?
Conduct a one-tailed hypothesis test for the mean at the .025 significance level. State the null and alternative. State the critical value. Draw a diagram. Provide the computation of the test statistics. State your decision in terms of the null hy..
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
In summer 2000, a growing number of warranty claims on Firestone tires sold on Ford SUVs prompted Firestone and Ford to issue a major recall. An analysis of warranty-claims data helped identify which models to recall.
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