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What are some of the concerns relating to the internal validity of a study and recommendations to strengthen it? How will the other 3 types of validity help? What are the dangers of failing to consider the validity of a research study?
A binary phase shift keying signal is defined. - Determine the autocorrelation function for the random process. - Is the process WSS?. - Determine the PSD.
Develop a probability tree showing all marginal, conditional, and joint probabilities and develop a joint probability table.
the number of automobiles that arrive at a certain intersection per minute has a poisson distribution with a mean of 5.
The probability of Toyota building a new production plant is 70% and the probability of GM building a new one is 50%. The following are the probabilities associated with the countries Toyota would build a new plant:
What sample size is needed to estimate the proportion of Americans who favor tougher gun control with 95% confidence and maximum error of 3%. Assume past studies indicted that the proportion is around 40%.
For a random sample of 200 undergraduates he finds that 70 have some kind of allergy. What is the standard error of the sample proportions?
State appropriate null and alternative hypotheses. Report the test statistic, its degrees of freedom, and the P-value. What do you conclude?
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
Show that F(x) is a distribution function of a discrete random variable.
Use the empirical rule to estimate the number of farms whose land and building values per acre are between $1100 and $1700.
suppose that 22.24 of all vehicles on the road get a fuel economy of at least 35 miles per gallon mpg. you conduct an
Describe how participants are assigned to conditions in randomized groups, matched-subjects, and repeated measures experimental designs.
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